# Dromos vs TriSync

The clearest difference is in-app purchases: Dromos at none against TriSync's 2. TriSync's advantage is iOS requirement (16.4 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. TriSync sells 2 in-app purchases, starting at $9.99 per 7 days. Dromos asks for nothing beyond the download.

Dromos ships an update every 11 days, TriSync every 3 weeks. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Dromos | TriSync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 weeks |
| Size | 5 MB | 63 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Emmanuel Breard](https://appshunter.io/developer/1890869933) | [Eric Guan](https://appshunter.io/developer/1785943658) |

## What reviewers say

### Dromos

[App page](https://appshunter.io/ios/app/dromos/id6761685023)

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

**In-app purchases:** none


### 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 Dromos free?

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

### Is TriSync free?

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

### Do Dromos or TriSync have ads?

Neither Dromos nor TriSync shows ads.

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

Dromos ships an update every 11 days, and TriSync every 3 weeks. Most recently, Dromos was updated on October 6, 2026 and TriSync on October 10, 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.*