# Keystone vs Keystone Institute

The clearest difference is update cadence: Keystone at every 3 months against Keystone Institute's every 33 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Keystone ships an update every 3 months, Keystone Institute every 33 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Keystone | Keystone Institute |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 33 months |
| Size | 31 MB | 34 MB |
| Requires iOS | 14.0 | 14 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Antell System S de RL de CV](https://appshunter.io/developer/1227463390) | [SCHOOL IBOX S.A.S. DE C.V.](https://appshunter.io/developer/1271228289) |

## What reviewers say

### Keystone

[App page](https://appshunter.io/ios/app/keystone/id1492776590)

**Features:** macOS Compatibility

**In-app purchases:** none


### Keystone Institute

[App page](https://appshunter.io/ios/app/keystone-institute/id1641736337)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Keystone free?

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

### Is Keystone Institute free?

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

### Do Keystone or Keystone Institute have ads?

Neither Keystone nor Keystone Institute shows ads.

### Which is updated more often, Keystone or Keystone Institute?

Keystone ships an update every 3 months, and Keystone Institute every 33 months. Most recently, Keystone was updated on October 25, 2026 and Keystone Institute on October 27, 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.*