# TrailStack vs FormSync

The clearest difference is in-app purchases: TrailStack at none against FormSync's 1. TrailStack also leads on update cadence (daily vs weekly) and iOS requirement (13.0 vs 15.1). FormSync's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. FormSync sells 1 one-off in-app purchase. TrailStack asks for nothing beyond the download.

TrailStack ships an update daily, FormSync weekly. The most recent releases landed on September 8, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | TrailStack | FormSync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Weekly |
| Size | 35 MB | 36 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hitoshi Tamura](https://appshunter.io/developer/1870454290) | [Hiroki Sugiyama](https://appshunter.io/developer/6778858327) |

## What reviewers say

### TrailStack

[App page](https://appshunter.io/ios/app/trailstack/id6758320260)

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

**In-app purchases:** none


### FormSync

[App page](https://appshunter.io/ios/app/formsync-swing-and-form-compare/id6779924474)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Upgrade | $4.99 | one-time |


## Frequently asked questions

### Is TrailStack free?

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

### Is FormSync free?

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

### Do TrailStack or FormSync have ads?

TrailStack shows ads; FormSync does not.

### Which is updated more often, TrailStack or FormSync?

TrailStack ships an update daily, and FormSync weekly. Most recently, TrailStack was updated on September 8, 2026 and FormSync on September 11, 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.*