Easy Deco vs Sym Junk
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Easy Deco
This app assists technical divers in planning dives for open circuit and closed circuit systems. It allows for easy setup of various gas mixes and cylinders, providing insights into their effects and requirements. The app warns users about critical factors like PPO2, ICD, and gas density.
- Open circuit and closed circuit dive planning
- Customizable gas and cylinder setups
- Real-time gas requirement calculations
- Warnings for PPO2, ICD, and gas density
- Supports multiple common gas mixes
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Dive planning app for open circuit and closed circuit technical divers. Easy setup of different gasses and cylinders for later use so you can quickly swap between your common mixes and see the effects and gas requirements for your dive plan. Warns for PPO2, ICD, gas density, gas requirements etc. Privacy Policy - http://www.tec-diver.eu/easy-deco-privacy-policy.html End User License Agreement - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Sym Junk
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SymJunk is a fast, offline-first companion for configuring your CCR dive computer and rebreather head over Bluetooth — so you set everything up calmly on the surface instead of squinting at tiny buttons on the unit. CONFIGURE EVERYTHING, OFFLINE • Edit screens, gases, gradient factors, setpoints, deco and more — all on your phone, no connection needed. • Save presets per category and pick them with one tap. • Three colour themes; metric or imperial. ONE-TAP FLEET SYNC • Mark your handset, HUD and CCR head, then push your settings to all of them in a single sync — with a clear before/after overview of exactly what changed. • The clock and time zone are set correctly on every device. DIVE LOGS & MAP • Download your dives and view depth, temperature, pO₂ and tank-pressure profiles. • See your dives on a map. Add your own dive-site name and location to any dive — with type-ahead so your favourite sites autofill. • Dive-site totals, ranked by number of dives. OFFLINE MAPS • Download a dive area for offline use, so the map works with no signal. REBREATHER TOOLS • Live CCR-head monitor: cells, setpoint, tank pressures, battery health and more. • Vacuum/positive test with an adjustable timer and live loop Δp. • Calibration guide that follows the head live. • Step-by-step assembly and calibration checklists. WAYPOINT PLANNING • Plan waypoints on a map and upload them to your computer. PRIVACY BY DESIGN • No account, no ads, no tracking. Your data stays on your phone. The only internet use is map tiles and place-name search. SymJunk is an independent hobby app and is NOT affiliated with, or endorsed by, Halcyon or Oxygen Scientific. All brand and product names belong to their respective owners. This is experimental software and not a dive-safety device — always verify every setting on the dive computer itself and rely on your training and certified equipment. Free to use, with an optional one-time Pro upgrade for fleet sync, waypoint upload and the live head monitor.
Screenshots
Verdict
The clearest difference is update cadence: Sym Junk at every 3 days against Easy Deco's every 2 months. On price, ads, in-app purchases and device support 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. Easy Deco sells 3 in-app purchases, starting at $1.99 per month and Sym Junk sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Easy Deco ships an update every 2 months, Sym Junk every 3 days. The most recent releases landed on September 25, 2026 and September 29, 2026 respectively.
| Parameter | Easy Deco | Sym Junk |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.3 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Millennium Ltd | Rogier Visser |
In-app purchases
Easy Deco
- Monthly7 Days trial$1.991 Month
- Annual14 Days trial$9.991 Year
- Lifetime$24.99
Sym Junk
- Divejunk$6.99








