# Subsurface vs Abysner

The clearest difference is price: Subsurface at Free against Abysner's $2.99. Subsurface also leads on ratings volume (48 vs 2). Abysner's advantage is review sentiment (100% vs 63%) and rating (5.0 vs 4.5). On update cadence, ads, in-app purchases and device support there is nothing between them.

Subsurface is free to download; Abysner costs $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 4.5. That said, the two scores are not equally well evidenced: Subsurface has 48 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 63% of Subsurface's written reviews are positive against 100% of Abysner's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Subsurface | Abysner |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/abysner/id6636477320/reviews)** |
| Number of ratings | **48** | 2 |
| Positive reviews | 63.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Paid |
| Size | 52 MB | 42 MB |
| Requires iOS | 17 | **15.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [Roelof Rene Smit](https://appshunter.io/developer/1762786000) |

## What reviewers say

### Subsurface

[App page](https://appshunter.io/ios/app/subsurface-mobile/id1093217161)

This application allows divers to manage their dive logs on their mobile devices. It supports editing dive data and downloading new information from compatible dive computers. Optional cloud synchronization is available for seamless data transfer with desktop versions.

**Highlights:** Mobile dive log management, Edit dive data, Download from Bluetooth LE dive computers, Optional cloud synchronization, Open-source and free

**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 Subsurface free?

Subsurface is free to download, with no in-app purchases.

### Is Abysner free?

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

### Which has better reviews, Subsurface or Abysner?

Abysner is rated higher. Subsurface averages 4.5 out of 5 from 48 ratings, while Abysner averages 5.0 from 2 ratings.

### Do Subsurface or Abysner have ads?

Neither Subsurface nor Abysner shows ads.

### Which is updated more often, Subsurface or Abysner?

Subsurface ships an update every 2 months, and Abysner every 2 months. Most recently, Subsurface was updated on October 6, 2026 and Abysner on October 5, 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.*