# iDeco Pro vs Abysner

The clearest difference is review sentiment: Abysner at 100% against iDeco Pro's 52%. Abysner also leads on rating (5.0 vs 3.9) and update cadence (every 2 months vs every 18 months). iDeco Pro's advantage is chart position (#82 vs unranked) and ratings volume (10 vs 2). On ads, in-app purchases, monetization model and device support there is nothing between them.

iDeco Pro costs $8.99 and Abysner $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Abysner holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: iDeco Pro has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 52% of iDeco Pro's written reviews are positive against 100% of Abysner's.

iDeco Pro ships an update every 18 months, Abysner every 2 months. The most recent releases landed on September 23, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | iDeco Pro | Abysner |
| --- | --- | --- |
| Price | $8.99 | **$2.99** |
| Rating | [3.9 (10 ratings)](https://appshunter.io/ios/app/ideco-pro/id329772936/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/abysner/id6636477320/reviews)** |
| Number of ratings | **10** | 2 |
| Positive reviews | 52.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Best chart rank | **#82** | — |
| Size | 3 MB | 42 MB |
| Requires iOS | **7.0** | 15.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [B2 Prototech LLC](https://appshunter.io/developer/1575972363) | [Roelof Rene Smit](https://appshunter.io/developer/1762786000) |

## What reviewers say

### iDeco Pro

[App page](https://appshunter.io/ios/app/ideco-pro/id329772936)

**Currently charting:** #82 Top Paid · Sports (US App Store)

This app is a comprehensive dive planner for technical divers, supporting both open circuit and closed-circuit rebreather (CCR) diving. It calculates decompression stops, gas usage, CNS and OTU exposure, and surface intervals. The app also includes a gas mixer for planning custom gas blends.

**Highlights:** Open Circuit and CCR dive planning, Decompression stop calculation, Gas usage and CNS/OTU tracking, Surface interval tracking, Gas fill/mixer functionality, Bailout planning for overhead environments, Configurable settings within the app

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Abysner

[App page](https://appshunter.io/ios/app/abysner/id6636477320)

This app is an open-source dive planning tool designed for simplicity and ease of use. It supports various gas mixes and decompression models, allowing for accurate planning of technical and recreational dives. Its intuitive interface makes it suitable for use even in challenging conditions.

**Highlights:** Buhlmann ZHL-16 A, B, C models, Multi-gas support (Air, Nitrox, Trimix, etc.), OTU and CNS tracking, Customizable environmental settings, Intuitive gas picker, Automatic contingency plans, Multi-level dive planning

**In-app purchases:** none


## Frequently asked questions

### Is iDeco Pro free?

iDeco Pro costs $8.99, with no in-app purchases.

### Is Abysner free?

Abysner costs $2.99, with no in-app purchases.

### Which has better reviews, iDeco Pro or Abysner?

Abysner is rated higher. iDeco Pro averages 3.9 out of 5 from 10 ratings, while Abysner averages 5.0 from 2 ratings.

### Do iDeco Pro or Abysner have ads?

Neither iDeco Pro nor Abysner shows ads.

### Which is updated more often, iDeco Pro or Abysner?

iDeco Pro ships an update every 18 months, and Abysner every 2 months. Most recently, iDeco Pro was updated on September 23, 2026 and Abysner on September 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*