# TrailStack vs Oki

The clearest difference is in-app purchases: TrailStack at none against Oki's 1. TrailStack also leads on update cadence (daily vs every 4 days) and iOS requirement (13.0 vs 18.5). On price, ads and device support there is nothing between them.

Both are free to download. Oki sells 1 in-app purchase, starting at $0.99 per month. TrailStack asks for nothing beyond the download.

TrailStack ships an update daily, Oki every 4 days. The most recent releases landed on September 8, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | TrailStack | Oki |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 4 days |
| Size | 35 MB | 11 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hitoshi Tamura](https://appshunter.io/developer/1870454290) | [keiryu matsumoto](https://appshunter.io/developer/1842495371) |

## What reviewers say

### TrailStack

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

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

**In-app purchases:** none


### Oki

[App page](https://appshunter.io/ios/app/oki-dori/id6758423779)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Oki-Dori Pro 月額プラン | $0.99 | per month |


## Frequently asked questions

### Is TrailStack free?

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

### Is Oki free?

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

### Do TrailStack or Oki have ads?

Both TrailStack and Oki show ads.

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

TrailStack ships an update daily, and Oki every 4 days. Most recently, TrailStack was updated on September 8, 2026 and Oki on September 6, 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.*