# Subsurface vs krakentools

The clearest difference is review sentiment: krakentools at 100% against Subsurface's 63%. krakentools also leads on update cadence (every 8 days vs every 2 months) and iOS requirement (15.0 vs 17). Subsurface's advantage is in-app purchases (none vs 3). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. krakentools sells 3 in-app purchases, starting at $3.99 per month. Subsurface asks for nothing beyond the download.

Subsurface ships an update every 2 months, krakentools every 8 days. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Subsurface | krakentools |
| --- | --- | --- |
| 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 | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | Free | Free |
| Size | 52 MB | 140 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [Arndt Kemper](https://appshunter.io/developer/1892010136) |

## 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


### krakentools

[App page](https://appshunter.io/ios/app/krakentools-tecrec-tools/id6761906896)

This comprehensive dive toolbox offers planning and safety features for recreational, Nitrox, TEC, and CCR divers. It includes a digital logbook with Bluetooth connectivity for various dive computers, extensive import/export options, and tools for underwater media editing.

**Highlights:** Dive planner for various dive types, Decompression planner with Bühlmann ZH-L16C, Gas planning and analysis tools, Digital logbook with Bluetooth sync, Import/export dive data, Underwater photo/video color correction, CCR-specific dive tools

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KrakenTools Pro - Monthly | $3.99 | per month |
| KrakenTools Pro - Yearly | $44.99 | per year |
| KrakenTools Pro Version | $49.99 | one-time |


## Frequently asked questions

### Is Subsurface free?

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

### Is krakentools free?

krakentools is free to download, with in-app purchases available.

### Do Subsurface or krakentools have ads?

Neither Subsurface nor krakentools shows ads.

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

Subsurface ships an update every 2 months, and krakentools every 8 days. Most recently, Subsurface was updated on October 14, 2026 and krakentools on October 15, 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.*