Dive Kit vs Thalos
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dive Kit
This app provides comprehensive dive planning tools for various gas mixes, including trimix and CCR dives. It offers a suite of free utilities for gas analysis, usage, and buoyancy calculations, alongside educational content and a certification wallet. The premium version unlocks advanced planning features for complex dives.
- Open-circuit, trimix, and CCR dive planning
- Automatic gas switching and unlimited segments
- Offline functionality
- Free dive utilities (gas analysis, usage, buoyancy)
- Dive signals and cylinder specifications
- Certification wallet
- Multi-language support
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The deco planner built for technical divers, plus eleven free tools for everyone on the boat. Dive Kit is a scuba deco planner for open-circuit, trimix and CCR dives on Bühlmann ZH-L16C with your gradient factors. It shows what every what-if costs: deeper, longer, a lost gas, a bailout from any point in the dive. Big type for direct sun, big targets for wet hands, routine tasks in seconds. Deco Planner (Pro) - Multi-level profiles with the deco woven around your levels: stops between levels when the plan needs them, gas switches placed where the PPO₂ allows - Gradient factors, last stop, ascent rates, air breaks, stop rounding (1 min, 30 s or 1 s) and PPO₂ bands per gas, all set per plan - Contingency tabs: deeper, longer, lost gas, or build your own. Each shows the extra run time, TTS and CNS against the base plan - Modifiers: working and deco SRMV and a delay at depth, on the base plan or on one contingency - CCR: setpoint schedules by depth, diluent switches, dilout, and open-circuit bailout from the end of the profile, after any level, at a run time or on ascent - Gas per cylinder: remaining pressure at each stop, a reserve per cylinder, ascent pressure, and what happens when a cylinder runs dry - Live warnings with the number and the limit: PPO₂, END, gas density, CNS, OTU, hypoxia, reserve - Repetitive dives, with tissue loading carried over the surface interval - Plan variants, overlaid on one graph - Share by QR code or link, no purchase needed to read it. Export the table or a slate image Eleven Free Tools No ads, nothing behind a sign-up. - Best Mix: nitrox and trimix by MOD, helium picked by END, with narcotic and density limits - Gas Specs: EAD, PPO₂, END and gas density with color-coded warnings - Gas Usage: multi-level consumption, turn pressure, thirds to sixths - SAC/SRMV: your real breathing rate from a dive; for twinsets and sidemount, enter the combined cylinder volume - Buoyancy: weighting from suit, body, gear and water, with lift and overweighting advisories - Blender: partial-pressure and continuous blending with real-gas corrections and expected analyzer readings - Mix Result: what a top-up or a decant actually gives you - Checklists: your own pre-dive routines and rebreather presets, with timers that survive closing the app - Cylinders, Converter, Signals. Cylinders named the way you buy them: AL80 at 3000 psi, or litres Reference & Learning - 90+ illustrated, searchable dive signals and 35+ cylinder specifications - Tutorials on gas physics, decompression theory and trimix, and help on key results Certification Wallet 25+ agencies, 190+ certifications, and a diver profile that holds your dive insurance details. Built for the Boat - Fully offline, on phones and tablets - Eight languages: English, German, Turkish, Swedish, Russian, Polish, Simplified Chinese, Korean - Light, dark and automatic themes No account. Your dive data stays on your device. Usage analytics and crash reports are optional and can be switched off in Settings. Pricing The Deco Planner is the only paid tool: a one-time lifetime purchase or a subscription. Everything else is free, for everyone. Warning and Disclaimer Dive Kit is a reference and planning aid for trained divers, and that covers all its tools. It is not a dive computer and not a substitute for training. The deco planner is for divers trained in decompression diving, and gas blending is for trained blenders. Results can be wrong, so check every result against a second source. Dive Kit is provided as is, and you use it at your own risk. Warning and disclaimer: https://divekit.app/safety/ Terms of Use: https://divekit.app/terms/ Privacy Policy: https://divekit.app/privacy-policy/ Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Thalos
This comprehensive dive app offers a robust dive logbook, detailed dive site information with emergency plans, and multiple dive calculators. It includes features for instructors to manage students and courses, and a social feed for divers to connect and share experiences. The app works fully offline, ensuring critical data is always accessible.
- Offline dive logbook
- Dive site database with emergency plans
- 9 essential dive calculators
- Instructor module for course management
- Social feed and community features
- Emergency mode for critical access
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Thalos is the all-in-one dive app built for serious divers and instructors. Whether you're planning a deep technical dive or running an open water course, Thalos has everything you need — and it works fully offline when it matters most. DIVE LOGBOOK Log every dive with depth, time, gas, conditions, marine life sightings, buddy signatures, and photos. Full version history keeps your records safe. Organize dives into trips and track your personal certifications. DIVE SITES & EMERGENCY PLANS Access 510+ dive sites with detailed emergency action plans, nearest hyperbaric chambers, and emergency contacts — all stored locally so they're available even without signal. 9 DIVE CALCULATORS • Bühlmann ZHL-16C decompression planner with gradient factors • Gas planner and gas blending • SAC rate, turn pressure, weight calculator • Dive tables, unit converter, altitude diving EMERGENCY MODE One tap gets you to emergency procedures and critical contacts. Works 100% offline. INSTRUCTOR MODULE Manage students, run courses with 26 built-in templates, track skill sign-offs, generate paperwork (liability waivers, medical forms, training dives), and issue certifications. SOCIAL FEED & TANK TAPS Share your dives, follow other divers, and give Tank Taps — the diver's way of saying nice dive. COMMUNITY Discover and post dive classes, trips, and dive centers. Instructors can manage enrollments directly in the app. SUBSCRIPTION Thalos requires a subscription after a 1-month free trial. $2.99/month or $19.99/year. Terms of Use: https://blackflagdivecenter.github.io/Thalos/terms.html Privacy Policy: https://blackflagdivecenter.github.io/Thalos/privacy.html
Screenshots
Verdict
The clearest difference is monetization model: Dive Kit at freemium against Thalos's subscription. Thalos's advantage is update cadence (daily vs every 3 days). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Dive Kit sells 3 in-app purchases, starting at $4.99 per month and Thalos sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Dive Kit against 5.0 for Thalos. Both are backed by a comparable volume of ratings — 2 and 2 respectively.
Dive Kit ships an update every 3 days, Thalos daily. The most recent releases landed on October 28, 2026 and October 13, 2026 respectively.
| Parameter | Dive Kit | Thalos |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 | 2 |
| Update frequency | Every 3 days | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium — better | Subscription |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 129 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | RONNY MAJANI | JOHN WALLIS YOUNGBLOOD |
Customer experience
Dive Kit
Thalos
In-app purchases
Dive Kit
- Skuba Tools Pro Monthly1 Month trial$4.991 Month
- Tip$0.99
- Decompression Planner$24.99
Thalos
- Thalos1 Month trial$2.991 Month
- Thalos1 Month trial$19.991 Year









