# DeepIsland 深岛 vs FastTrack

The clearest difference is price: FastTrack at Free against DeepIsland 深岛's $0.99. FastTrack also leads on iOS requirement (14.0 vs 18.2). DeepIsland 深岛's advantage is in-app purchases (none vs 2). On update cadence, ads and device support there is nothing between them.

FastTrack is free to download; DeepIsland 深岛 costs $0.99 up front. FastTrack sells 2 in-app purchases, starting at $2.99 per year. DeepIsland 深岛 asks for nothing beyond the download.

DeepIsland 深岛 ships an update every 4 days, FastTrack every 5 days. The most recent releases landed on October 10, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | DeepIsland 深岛 | FastTrack |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 22 MB | 49 MB |
| Requires iOS | 18.2 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [鉴 郗](https://appshunter.io/developer/559961494) | [Fernando Mendes](https://appshunter.io/developer/1878625841) |

## What reviewers say

### DeepIsland 深岛

[App page](https://appshunter.io/ios/app/deepisland/id6741362565)

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

**In-app purchases:** none


### FastTrack

[App page](https://appshunter.io/ios/app/fasttrack-fasting-timer/id6759444553)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly | $2.99 | per year |
| Lifetime | $5.99 | one-time |


## Frequently asked questions

### Is DeepIsland 深岛 free?

DeepIsland 深岛 costs $0.99, with no in-app purchases.

### Is FastTrack free?

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

### Do DeepIsland 深岛 or FastTrack have ads?

Neither DeepIsland 深岛 nor FastTrack shows ads.

### Which is updated more often, DeepIsland 深岛 or FastTrack?

DeepIsland 深岛 ships an update every 4 days, and FastTrack every 5 days. Most recently, DeepIsland 深岛 was updated on October 10, 2026 and FastTrack on September 29, 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.*