# Subsurface vs PenangAcademy

The clearest difference is update cadence: PenangAcademy at monthly against Subsurface's every 2 months. PenangAcademy also leads on iOS requirement (15.6 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, PenangAcademy monthly. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Subsurface | PenangAcademy |
| --- | --- | --- |
| 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 | **Monthly** |
| Monetization | Free | — |
| Size | 52 MB | 75 MB |
| Requires iOS | 17 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Hohndel](https://appshunter.io/developer/1093217160) | [Wai Ling Tan](https://appshunter.io/developer/1850074332) |

## 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


### PenangAcademy

[App page](https://appshunter.io/ios/app/penangacademy/id6754785798)

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

**In-app purchases:** none


## Frequently asked questions

### Is Subsurface free?

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

### Is PenangAcademy free?

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

### Do Subsurface or PenangAcademy have ads?

Neither Subsurface nor PenangAcademy shows ads.

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

Subsurface ships an update every 2 months, and PenangAcademy monthly. Most recently, Subsurface was updated on October 14, 2026 and PenangAcademy on October 3, 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.*