# Subsurface vs Track Day Essentials

The clearest difference is update cadence: Track Day Essentials at fortnightly against Subsurface's every 2 months. Track Day Essentials also leads on iOS requirement (13.4 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, Track Day Essentials fortnightly. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Subsurface | Track Day Essentials |
| --- | --- | --- |
| 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 | **Fortnightly** |
| Monetization | Free | — |
| Size | 52 MB | 18 MB |
| Requires iOS | 17 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [BYTEFINE SP Z O O](https://appshunter.io/developer/1699345078) |

## 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


### Track Day Essentials

[App page](https://appshunter.io/ios/app/track-day-essentials/id6504826080)

**In-app purchases:** none


## Frequently asked questions

### Is Subsurface free?

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

### Is Track Day Essentials free?

Track Day Essentials is free to download, with no in-app purchases.

### Do Subsurface or Track Day Essentials have ads?

Neither Subsurface nor Track Day Essentials shows ads.

### Which is updated more often, Subsurface or Track Day Essentials?

Subsurface ships an update every 2 months, and Track Day Essentials fortnightly. Most recently, Subsurface was updated on October 6, 2026 and Track Day Essentials on October 8, 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.*