# IK vs Mastro

The clearest difference is in-app purchases: Mastro at none against IK's 1. IK's advantage is iOS requirement (11.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

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

IK ships an update every 8 days, Mastro every 4 days. The most recent releases landed on September 20, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | IK | Mastro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 4 days** |
| Size | 73 MB | 50 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ISIUM](https://appshunter.io/developer/1509787119) | [REIZON FOREACH](https://appshunter.io/developer/1193689629) |

## What reviewers say

### IK

[App page](https://appshunter.io/ios/app/ik/id1561963472)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription IK+ | $2.99 | one-time |


### Mastro

[App page](https://appshunter.io/ios/app/mastro/id6760676469)

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

**In-app purchases:** none


## Frequently asked questions

### Is IK free?

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

### Is Mastro free?

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

### Do IK or Mastro have ads?

Neither IK nor Mastro shows ads.

### Which is updated more often, IK or Mastro?

IK ships an update every 8 days, and Mastro every 4 days. Most recently, IK was updated on September 20, 2026 and Mastro on October 8, 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.*