# Fosterate vs Calistta

The clearest difference is update cadence: Fosterate at every 3 weeks against Calistta's every 2 months. Fosterate also leads on iOS requirement (12.0 vs 15.0). 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.

Fosterate ships an update every 3 weeks, Calistta every 2 months. The most recent releases landed on September 20, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Fosterate | Calistta |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 80 MB | 130 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Fosterate Private Limited](https://appshunter.io/developer/1494376184) | [TRIOLOGIC ENTERPRISES PRIVATE LIMITED](https://appshunter.io/developer/1743921366) |

## What reviewers say

### Fosterate

[App page](https://appshunter.io/ios/app/fosterate/id6475658963)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calistta

[App page](https://appshunter.io/ios/app/calistta/id6740513951)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fosterate free?

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

### Is Calistta free?

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

### Do Fosterate or Calistta have ads?

Neither Fosterate nor Calistta shows ads.

### Which is updated more often, Fosterate or Calistta?

Fosterate ships an update every 3 weeks, and Calistta every 2 months. Most recently, Fosterate was updated on September 20, 2026 and Calistta on September 14, 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.*