# Subsurface vs Diving Calculator

The clearest difference is update cadence: Diving Calculator at weekly against Subsurface's every 2 months. Diving Calculator also leads on iOS requirement (12.0 vs 17). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Subsurface ships an update every 2 months, Diving Calculator weekly. Both last shipped on October 6, 2026.

## The numbers

| Metric | Subsurface | Diving Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (48 ratings)](https://appshunter.io/ios/app/subsurface-mobile/id1093217161/reviews)** | — |
| Number of ratings | **48** | — |
| Positive reviews | 63.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | — |
| Size | 52 MB | 33 MB |
| Requires iOS | 17 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [Alberto Segovia](https://appshunter.io/developer/1724272655) |

## 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


### Diving Calculator

[App page](https://appshunter.io/ios/app/diving-calculator/id6680148006)

**In-app purchases:** none


## Frequently asked questions

### Is Subsurface free?

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

### Is Diving Calculator free?

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

### Do Subsurface or Diving Calculator have ads?

Neither Subsurface nor Diving Calculator shows ads.

### Which is updated more often, Subsurface or Diving Calculator?

Subsurface ships an update every 2 months, and Diving Calculator weekly. Most recently, Subsurface was updated on October 6, 2026 and Diving Calculator on October 6, 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.*