# Starwise vs Probability Theory Foundations

The clearest difference is in-app purchases: Probability Theory Foundations at none against Starwise's 2. Probability Theory Foundations also leads on ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Starwise sells 2 in-app purchases, starting at $6.99 per 7 days. Probability Theory Foundations asks for nothing beyond the download.

## The numbers

| Metric | Starwise | Probability Theory Foundations |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 days | — |
| Size | 47 MB | 38 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Salvaterra Tech](https://appshunter.io/developer/1864092163) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### Starwise

[App page](https://appshunter.io/ios/app/starwise-interview-coach/id6756988741)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starwise Premium – Weekly | $6.99 | per 7 days |
| Starwise Premium – Yearly | $39.99 | per year |


### Probability Theory Foundations

[App page](https://appshunter.io/ios/app/probability-theory-foundations/id6773734025)

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

**In-app purchases:** none


## Frequently asked questions

### Is Starwise free?

Starwise is free to download, with in-app purchases available.

### Is Probability Theory Foundations free?

Probability Theory Foundations is free to download, with no in-app purchases.

### Do Starwise or Probability Theory Foundations have ads?

Starwise shows ads; Probability Theory Foundations does not.

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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.*