# FastFox vs TriSync

The clearest difference is ads: TriSync at none against FastFox's shown. TriSync also leads on update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. FastFox sells 1 one-off in-app purchase and TriSync sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

FastFox ships an update every 2 months, TriSync every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | FastFox | TriSync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 51 MB | 63 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [MyQuietSpot Inc.](https://appshunter.io/developer/1841316087) | [Eric Guan](https://appshunter.io/developer/1785943658) |

## What reviewers say

### FastFox

[App page](https://appshunter.io/ios/app/fastfox-intermittent-fasting/id6761245094)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastFox Pro | $14.99 | one-time |


### TriSync

[App page](https://appshunter.io/ios/app/trisync-triathlon-training/id6790627390)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TriSync Weekly 2 | $9.99 | per 7 days |
| TriSync Yearly 2 | $79.99 | per year |


## Frequently asked questions

### Is FastFox free?

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

### Is TriSync free?

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

### Do FastFox or TriSync have ads?

FastFox shows ads; TriSync does not.

### Which is updated more often, FastFox or TriSync?

FastFox ships an update every 2 months, and TriSync every 3 weeks. Most recently, FastFox was updated on October 25, 2026 and TriSync on October 24, 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.*