# Kalla vs Retro Pilates

The clearest difference is update cadence: Kalla at daily against Retro Pilates's every 4 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.

Kalla ships an update daily, Retro Pilates every 4 months. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Kalla | Retro Pilates |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 4 months |
| Size | 7 MB | 121 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Joe Gennari](https://appshunter.io/developer/1827371588) | [Sutra Fitness, Inc.](https://appshunter.io/developer/914371834) |

## What reviewers say

### Kalla

[App page](https://appshunter.io/ios/app/kalla/id6748783488)

**Features:** macOS Compatibility

**In-app purchases:** none


### Retro Pilates

[App page](https://appshunter.io/ios/app/retro-pilates/id6756025606)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kalla free?

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

### Is Retro Pilates free?

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

### Do Kalla or Retro Pilates have ads?

Neither Kalla nor Retro Pilates shows ads.

### Which is updated more often, Kalla or Retro Pilates?

Kalla ships an update daily, and Retro Pilates every 4 months. Most recently, Kalla was updated on November 5, 2026 and Retro Pilates on November 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*