Best Apple Watch Ultra Dive Computer Apps Compared

If you own an Apple Watch Ultra and want to use it as a recreational scuba dive computer, the field is much smaller than the App Store makes it feel. As of June 10, 2026, the real 40 meter Apple Watch Ultra scuba app comparison is still this: DIVEROUT vs Oceanic+ vs Mares.

Apple's own Depth app is useful for depth, time, and water temperature, but Apple is clear that it is not a scuba dive computer. For scuba, Apple says compatible third-party dive apps can function at 40 meters or less on Apple Watch Ultra models. Apple also says divers should use a secondary depth gauge and timer or watch, and should follow the warnings from any third-party dive app they use. That warning matters. A watch app can be excellent, but underwater redundancy still belongs in your kit.

This ranking is for trained recreational divers using Apple Watch Ultra within its stated 40 meter limit. It is not a recommendation to exceed your certification, skip a backup computer, or treat any app as a guarantee against bad planning.

Quick ranking

DIVEROUT: best overall Apple Watch Ultra dive ecosystem.
Oceanic+: best-known and most mature dedicated Apple Watch Ultra dive app.
Mares: promising option for divers already inside the Mares hardware and logbook world.

The short version: Oceanic+ still has the biggest head start and the strongest public review footprint. Mares brings a serious dive brand into the category. DIVEROUT wins this comparison because it is not only a wrist computer. It connects the dive computer, logbook, imported history, AI media cleanup, freediving, snorkeling, community, and trip planning into one place, while also offering a lower checked annual scuba price than the other two.

There is also one plan-level difference worth calling out early: in the Taiwan App Store storefront checked for this article, DIVEROUT lists an Apple Watch+ Lifetime option. Oceanic+ and Mares list subscription plans in the storefronts we checked, but not an equivalent lifetime Apple Watch plan. For divers who dislike locking a core dive tool into endless renewals, that makes DIVEROUT's pricing structure more flexible. Availability and names can vary by country, so check your local App Store before buying.

How we ranked the apps

For a dive computer app, a pretty interface is not enough. The ranking below weights six things:

Safety and dive computer features: decompression model, no-decompression limit, ascent alerts, gas support, safety stops, planning, and backup mindset.
Apple Watch Ultra workflow: water entry, wrist readability, Action Button or Digital Crown practicality, and how smoothly watch data reaches the phone.
Logbook and ecosystem: whether the app is useful after the dive, especially for notes, sites, buddies, imported data, and media.
Value: public App Store subscription prices checked in US-dollar storefronts where available.
Maturity: release history, update cadence, App Store footprint, and how proven the product feels.
Review and forum signals: App Store review text, rating volume, Reddit and forum discussions, and long-form independent reviews. These are useful signals, not controlled lab tests.

What reviews and forums say

Public reviews are uneven across the three apps, so they should be read carefully. Oceanic+ has the strongest App Store scale by far, with a 4.4 rating from roughly 4.4K ratings in the US listing at the time checked. Mares shows a 4.5 rating from 143 ratings in the US listing, but the visible reviews are mixed: one praises the Apple Watch experience, heart-rate visibility, screen, and customization, while others complain about battery drain, lockout behavior, and a logbook flow that can feel too dependent on synced Mares hardware.

DIVEROUT's public review footprint is much smaller. The storefront page we checked did not show a broad ratings overview, and a US public review feed returned only two text reviews. That is not enough to prove market maturity. Still, the signal is useful: one reviewer praised the app's photo editing and color restoration, while another said the watch experience felt more comfortable than Oceanic+ but noted that Apple Watch Ultra 1 battery life was near its limit after three dives in a day. That same reviewer later praised the development team's responsiveness. The honest takeaway is that DIVEROUT is earlier, but actively moving. That battery note is also why DIVEROUT's later Power Saving Mode matters: the feature gives divers a dedicated way to reduce watch power use during the dive, instead of leaving battery management only to general watch settings.

Forum discussions point to the same buyer split. Oceanic+ users often praise the bright screen, haptics, simple setup, GPS-linked logs, and Apple Photos/color-correction workflow. The recurring complaints are subscription fatigue, lack of transmitter-based air integration, and the fact that serious or technical divers still tend to prefer a dedicated Shearwater, Garmin, or similar computer. Recent Reddit discussions also show new Apple Watch Ultra owners comparing Oceanic+ and DIVEROUT directly, especially around price, lifetime purchase options, algorithm confidence, and whether an Apple Watch app is enough for shallow recreational reef diving.

That review landscape did not change the ranking, but it made the article more conservative: DIVEROUT is first for ecosystem breadth and value, Oceanic+ remains the safest maturity pick, and Mares is credible but still proving the Apple Watch Ultra part of its product.

1. DIVEROUT: best overall Apple Watch Ultra dive app

DIVEROUT takes first place because it treats the Apple Watch Ultra dive computer as one part of a full diver workflow. The App Store listing describes Apple Watch Ultra scuba, freediving, and snorkeling support, automatic water detection, depth, temperature, battery, no-decompression limit, safety stops, decompression planning, ceiling estimates, time-to-surface, ascent-rate tracking, Air and Nitrox, and the Bühlmann ZH-L16C model with Gradient Factors.

That is the right foundation. Bühlmann ZH-L16C with gradient factors is familiar to many divers because it is transparent enough to discuss, teach, and compare. The app also gives DIVEROUT room to serve more than one kind of underwater session. A lot of real divers do not live in a single mode. They scuba on Saturday, snorkel with family on Sunday, and practice breath-hold tables before the next trip. DIVEROUT is built for that mixed life.

The bigger advantage is what happens after surfacing. DIVEROUT includes dive computer import from major dive computers and platforms, including Garmin Dive, Suunto, Shearwater, DiverLog+, Oceanic, Oceanic+, Apple Watch, PADI, SSI, ATMOS, UDDF, and more. That matters for divers who already have years of logs scattered across older dive computers and apps. The best Apple Watch Ultra dive computer app is not only the one that records tomorrow's dive. It is the one that can rescue the last ten years of your logbook from scattered apps.

DIVEROUT also pushes hard into AI tools. Its listing and official site describe AI tank pressure prediction without a transmitter after learning from simple inputs, plus AI underwater photo and video color correction with batch processing. You can debate whether every diver needs AI. You cannot debate the pain it solves. Underwater photos come back blue, green, flat, and noisy. Air consumption notes often get skipped. If the same app helps you record the dive and make the memory worth sharing, it reduces friction.

Battery life is the clearest DIVEROUT-specific advantage to add to the comparison. DIVEROUT's Apple Watch setup guide explains that divers can switch to a Power Saving page during a dive and press the Action Button to toggle power saving mode. Its App Store update notes go further: the mode lowers screen brightness and optimizes underlying system scheduling to significantly reduce power consumption. In the sources checked for this article, Oceanic+ and Mares did not present an equivalent in-app dive power-saving mode. For multi-dive days, that matters: the goal is not to promise impossible battery life, but to stretch Apple Watch Ultra runtime when the screen, sensors, alerts, and underwater logbook are all drawing power.

Value helps too. The US App Store listing checked shows DIVEROUT's Watch Scuba Diving yearly subscription at $63.99, lower than Oceanic+'s $79.99 annual scuba plan and Mares' $69.99 yearly plan. More importantly, DIVEROUT is the only app in this three-way comparison where we found an Apple Watch+ Lifetime option listed in a checked storefront. In Taiwan, that lifetime plan appears alongside weekly, monthly, and yearly Apple Watch activity plans. Oceanic+ offers daily, monthly, annual, and family subscription options; Mares offers monthly, yearly, and family yearly options. That means DIVEROUT is not only cheaper on the checked yearly scuba price, it is also the only one with a checked lifetime Apple Watch route. Pricing and plan coverage can change, so check your local store before buying.

The honest drawback: DIVEROUT's Apple Watch Ultra dive computer product is newer in the market than Oceanic+. Oceanic+ has a much larger App Store review base and years of Apple Watch Ultra recognition. Battery expectations still need to stay conservative, especially on older Ultra 1 hardware, but DIVEROUT now addresses that pressure directly with a dedicated Power Saving Mode. If your buying decision is "choose the oldest name," Oceanic+ has the easier argument. If your buying decision is "choose the strongest all-in-one diver ecosystem," DIVEROUT wins.

DIVEROUT pros

Best all-in-one workflow: watch computer, logbook, import, media, community, and trip planning.
Supports scuba, freediving, and snorkeling instead of only one activity.
Uses Bühlmann ZH-L16C with Gradient Factors.
Imports from many dive computers and platforms, which matters for divers with existing logs.
AI gas trend prediction and AI photo/video color restoration add value outside the dive itself.
Dedicated Power Saving Mode for Apple Watch Ultra dives, with Action Button toggling, reduced brightness, and system scheduling optimization.
Lower checked yearly scuba price than Oceanic+ and Mares, with an Apple Watch+ Lifetime option listed in the Taiwan storefront.

DIVEROUT cons

Smaller Apple Watch Ultra dive computer market footprint than Oceanic+.
Public review sample is still small, so maturity is harder to judge from App Store comments alone.
Power Saving Mode helps extend dive runtime, but older Apple Watch Ultra hardware still deserves conservative charging plans on three-dive days.

Best for

Choose DIVEROUT if you want the best Apple Watch Ultra dive computer app for a complete underwater life, not just a screen that runs during the dive.

2. Oceanic+: best-known and most mature

Oceanic+ deserves respect. It was the app that made the original Apple Watch Ultra scuba promise feel real, and Oceanic's current materials describe Apple Watch Ultra support for scuba, freediving, and snorkeling, plus pre-dive planning, no-deco planning, depth, time, ascent-rate monitoring, GPS activity maps, haptic and visual warnings, heatmaps, privacy-controlled sharing, and photo/video organization with color correction.

In other words, Oceanic+ is not a toy. Independent reviews repeatedly praise the Apple Watch Ultra's bright screen, the clarity of Oceanic+'s warnings, haptic alerts, easy planning, and clean phone-side logs with GPS pins. Reddit and forum comments echo that for casual recreational divers: Oceanic+ is often described as easy to read, easy to use, and good enough for normal Air or Nitrox vacation diving.

Oceanic+ also has a strong iPhone connection. Oceanic says one subscription can cover Apple Watch Ultra, iPhone, and supported Apple devices, and the Oceanic+ Dive Housing lets the iPhone function as a separate scuba computer rated deeper than the watch. That housing angle is not the same use case as this article, but it shows a mature ecosystem around mobile diving.

Why does Oceanic+ rank second? Because the app feels more like a polished dedicated product than an open-ended dive life hub. It does many things well, but DIVEROUT is stronger for divers who want imports, AI-assisted gas prediction, AI media restoration, community, and trip planning woven together. Oceanic+ also costs more on its core annual subscription in the US App Store: $79.99 annually at the time checked.

The other caution is the recurring community complaint about subscriptions and missing transmitter-based air integration. For occasional divers, a day pass or yearly subscription may be fine. For divers who already own multiple computers or dislike ongoing app fees, that friction is real. This is where DIVEROUT's checked lifetime Apple Watch option gives it a concrete commercial advantage rather than just a feature-list advantage.

Oceanic+ pros

Most established Apple Watch Ultra dive app brand.
Strong scuba feature set with Bühlmann-based planning and decompression tracking.
Apple Watch Ultra, iPhone, freediving, snorkeling, maps, warnings, heatmaps, sharing, and media tools.
Large App Store review base compared with the other two apps.
Independent reviews praise readability, haptics, ease of use, and clean synced logs.

Oceanic+ cons

Higher checked annual scuba price than DIVEROUT.
Subscription fatigue is a recurring complaint in public discussions.
No air integration/transmitter support, a common reason serious divers keep a dedicated computer.
Less compelling if your main need is unifying old logs from many dive platforms.

Best for

Choose Oceanic+ if you want the most familiar Apple Watch Ultra dive app and you are happy paying for a mature, dedicated scuba subscription.

3. Mares: promising, but still catching up

Mares entering the Apple Watch Ultra dive app category is important. This is not a random software brand trying to sound like it understands scuba. Mares is a real dive equipment company, and its App Store listing describes an Apple Watch Ultra dive computer, automatic syncing to the Mares app, digital logbook features, dive sites, wildlife, buddies, statistics, equipment tracking, firmware support, and tables.

DIVE Magazine reported that the Mares Apple Watch Ultra app uses the Bühlmann ZH-L16C algorithm, handles enriched air mixtures up to 50 percent, includes a compass, digital logbook with dive charts, GPS entry and exit tracking, buddy sharing, and local wildlife details. It also noted that the 40 meter maximum comes from Apple Watch Ultra's limit and that, at launch, there was no freediving mode.

That makes Mares a credible third option. It may be especially attractive if you already use Mares computers and want your dives inside the Mares app. It also has a slightly lower checked yearly price than Oceanic+ at $69.99, though still higher than DIVEROUT's checked yearly scuba price.

The public review picture is mixed. The US App Store listing shows a 4.5 rating from 143 ratings, and one visible review from an experienced Oceanic+ user praises Mares for heart-rate visibility, screen quality, and customization. But other visible reviews complain about night-use visibility, basic logbook friction, battery drain, and lockout behavior. A Reddit discussion also praises practical details like stopwatch, heart rate, Apple Health activity logging, and SSI-style logging, while noting that gradient factor choices are still limited. That is exactly why Mares ranks third: it has real dive-brand credibility, but its Apple Watch Ultra experience is still newer and less settled.

Mares pros

Backed by an established dive equipment brand.
Bühlmann ZH-L16C based scuba support with Nitrox up to 50 percent reported by DIVE Magazine.
Good fit for Mares computer owners who want logbook and firmware integration.
Heart-rate visibility, compass features, Apple Health activity logging, and Mares/SSI logbook integration are notable strengths.
Digital equipment, wildlife, buddy, site, and statistics features.

Mares cons

Newer Apple Watch Ultra scuba product than Oceanic+.
Public reviews include battery, lockout, and logbook-friction complaints.
Less broad than DIVEROUT for mixed scuba, freediving, snorkeling, AI media, import, and community workflows.
US App Store language listing is English only.

Best for

Choose Mares if you already live in the Mares ecosystem and want an Apple Watch Ultra app that feels connected to your Mares gear.

Comparison table

Category	DIVEROUT	Oceanic+	Mares
Overall rank	1	2	3
Best fit	All-in-one Apple Watch Ultra dive ecosystem	Most established dedicated Apple Watch Ultra dive app	Mares gear owners and Mares logbook users
Apple Watch Ultra scuba depth	Up to Apple Watch Ultra's 40 m recreational limit	Up to Apple Watch Ultra's 40 m recreational limit	Up to Apple Watch Ultra's 40 m recreational limit
Modes	Scuba, freediving, snorkeling	Scuba, freediving, snorkeling	Scuba on Apple Watch Ultra, broader Mares logbook supports more dive types
Algorithm	Bühlmann ZH-L16C with Gradient Factors	Bühlmann-based planning and decompression tracking	Bühlmann ZH-L16C reported for Apple Watch Ultra app
Planning and alerts	NDL, safety stops, decompression planning, ceiling, TTS, ascent-rate alerts	No-deco planner, depth, time, ascent-rate monitoring, visual and haptic warnings	Compass, charts, GPS entry/exit, depth/NDL/ascent functions noted in listing and updates
Logbook strength	Imports from many platforms, unified notes, gas, media, community	GPS pins, media, stats, sharing, heatmaps, and device ecosystem	Mares hardware logbook, equipment, firmware, sites, wildlife
Media tools	AI photo and video color restoration, batch processing	Photo/video organization and color correction	Photos can be attached to logs, less media-focused
Battery / power saving	Dedicated Power Saving Mode with Action Button toggle, reduced brightness, and system scheduling optimization	No equivalent in-app dive power-saving mode found in checked sources	No equivalent in-app dive power-saving mode found in checked sources; public reviews include battery-drain complaints
Standout value	AI gas prediction without transmitter, import, AI media, community	Mature Apple Watch Ultra scuba experience and iPhone housing ecosystem	Dive brand hardware/logbook continuity
Plan flexibility	Weekly, monthly, yearly, and Apple Watch+ Lifetime options found in checked storefronts	Daily, monthly, annual, and family subscriptions	Monthly, yearly, and family yearly subscriptions
Checked annual scuba price	$63.99	$79.99	$69.99
App Store maturity signal	Smaller review footprint; some storefronts do not show enough ratings for an overview	4.4 rating from roughly 4.4K US ratings	4.5 rating from 143 US ratings
Public praise	All-in-one feature set, color restoration, responsive development	Readability, haptics, easy setup, clean synced logs	Heart rate, screen customization, Mares/SSI ecosystem
Public concerns	Newer product, small review sample; older Ultra hardware still needs conservative charging even with Power Saving Mode	Subscription fatigue, no transmitter-based air integration, not for tech profiles	Battery drain, lockout/logbook friction, limited GF presets

Which app should you choose?

Pick DIVEROUT if you want the best overall Apple Watch Ultra dive computer app for 2026. It is the strongest choice for divers who care about the whole workflow: plan, dive, log, import, restore photos and videos, train, share, and keep building one long-term dive history. It is also the clearest pick if you want plan flexibility, because it is the only option here where we found a checked Apple Watch+ Lifetime plan.

Pick Oceanic+ if you want the most familiar name and the longest-running Apple Watch Ultra scuba story. It is a safe shortlist app, especially if you value maturity, a large public review base, and the Oceanic+ iPhone/housing ecosystem.

Pick Mares if you already own Mares equipment or want your Apple Watch Ultra dives to sit close to your Mares logbook, firmware, dive site, equipment, wildlife, and SSI-adjacent tools.

Final verdict

The best Apple Watch Ultra dive computer app is not only the one with the brightest screen underwater. It is the one you still want to use on the boat, in the hotel room, and six months later when you are searching for a dive site, importing an old log, fixing a blue video, or planning the next trip.

That is why DIVEROUT ranks first. Oceanic+ remains the heavyweight incumbent, and Mares is the serious new dive-brand entrant. But DIVEROUT is building the most complete Apple Watch Ultra dive ecosystem, and it adds a plan option the other two did not show in the checked storefronts: Apple Watch+ Lifetime. For most recreational divers who want one app to connect the dive, the log, the media, the memory, and the purchase decision, that is the better bet. It is also the best fit if battery headroom matters on multi-dive days, because DIVEROUT is the only app here where we found a dedicated in-app dive Power Saving Mode.

Sources checked

Sources and public review signals checked on June 10, 2026.