# Perform Outer Space vs Biorhythm Calc

The clearest difference is update cadence: Biorhythm Calc at every 2 weeks against Perform Outer Space's every 39 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.

Perform Outer Space ships an update every 39 months, Biorhythm Calc every 2 weeks. The most recent releases landed on June 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Perform Outer Space | Biorhythm Calc |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 308 MB | 24 MB |
| Requires iOS | 12.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Perform](https://appshunter.io/developer/666961872) | [Kornel Kaulics](https://appshunter.io/developer/1501407664) |

## What reviewers say

### Perform Outer Space

[App page](https://appshunter.io/ios/app/perform-outer-space/id895079816)

Explore the cosmos with interactive games and educational content. Children can learn about planets, practice spelling, and boost memory skills. Enjoy imaginative videos, songs, and dances about outer space.

**Highlights:** Space exploration games, Spelling practice, Memory games, Outer space songs, Dances and poems, Educational videos

**Features:** macOS Compatibility

**In-app purchases:** none


### Biorhythm Calc

[App page](https://appshunter.io/ios/app/biorhythm-calc/id6748093533)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Perform Outer Space free?

Perform Outer Space is free to download, with no in-app purchases.

### Is Biorhythm Calc free?

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

### Do Perform Outer Space or Biorhythm Calc have ads?

Neither Perform Outer Space nor Biorhythm Calc shows ads.

### Which is updated more often, Perform Outer Space or Biorhythm Calc?

Perform Outer Space ships an update every 39 months, and Biorhythm Calc every 2 weeks. Most recently, Perform Outer Space was updated on June 10, 2026 and Biorhythm Calc on September 9, 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.*