# Probability Toolkit vs Owlet

The clearest difference is price: Owlet at Free against Probability Toolkit's $1.99. Owlet also leads on update cadence (every 5 months vs every 10 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Owlet is free to download; Probability Toolkit costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Probability Toolkit ships an update every 10 months, Owlet every 5 months. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Probability Toolkit | Owlet |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 5 months** |
| Size | 41 MB | 123 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [BirdBrain Technologies LLC](https://appshunter.io/developer/1012525349) |

## What reviewers say

### Probability Toolkit

[App page](https://appshunter.io/ios/app/probability-toolkit/id652216774)

**Features:** macOS Compatibility

**In-app purchases:** none


### Owlet

[App page](https://appshunter.io/ios/app/owlet-fractions/id1554120188)

**In-app purchases:** none


## Frequently asked questions

### Is Probability Toolkit free?

Probability Toolkit costs $1.99, with no in-app purchases.

### Is Owlet free?

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

### Do Probability Toolkit or Owlet have ads?

Neither Probability Toolkit nor Owlet shows ads.

### Which is updated more often, Probability Toolkit or Owlet?

Probability Toolkit ships an update every 10 months, and Owlet every 5 months. Most recently, Probability Toolkit was updated on October 19, 2026 and Owlet on October 16, 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.*