# Frame vs Probability

The clearest difference is price: Frame at Free against Probability's $1.99. Frame also leads on iOS requirement (10.0 vs 14.0). Probability's advantage is chart position (#95 vs unranked) and update cadence (every 3 months vs every 6 months). On ads, in-app purchases and device support there is nothing between them.

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

Frame ships an update every 6 months, Probability every 3 months. Both last shipped on September 23, 2026.

## The numbers

| Metric | Frame | Probability |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[4.9 (193 ratings)](https://appshunter.io/ios/app/probability-distributions/id889106396/reviews)** |
| Number of ratings | — | **193** |
| Positive reviews | — | 97.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | — | Free |
| Best chart rank | — | **#95** |
| Size | 8 MB | 2 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tsutomu Murata](https://appshunter.io/developer/674892164) | [Matthew Bognar](https://appshunter.io/developer/889106399) |

## What reviewers say

### Frame

[App page](https://appshunter.io/ios/app/frame-i/id674892161)

**Features:** macOS Compatibility

**In-app purchases:** none


### Probability

[App page](https://appshunter.io/ios/app/probability-distributions/id889106396)

**Currently charting:** #95 Top Paid · Education (US App Store)

Calculate probabilities, find percentiles, and visualize probability density or mass functions for a wide range of continuous and discrete statistical distributions. Explore common distributions like normal, binomial, Poisson, and many more.

**Highlights:** Compute probabilities, Determine percentiles, Plot probability density function, Plot probability mass function, Supports 10+ continuous distributions, Supports 5+ discrete distributions

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use interface
- 📊 Great for probability distributions
- 💡 Useful for checking work and homework
- 💰 Free advanced functions
- 📈 Visualizes data and distributions

**What reviewers complain about**

- 🚫 Not allowed on some exams
- 🤔 Some users want more features

**Requested features**

- Exam mode similar to Geogebra
- Poisson distribution
- Allow setting plot boundaries (e.g., for Beta distribution)
- Make formulae available in offline mode
- Clearly introduce parameters


## Frequently asked questions

### Is Frame free?

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

### Is Probability free?

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

### Do Frame or Probability have ads?

Neither Frame nor Probability shows ads.

### Which is updated more often, Frame or Probability?

Frame ships an update every 6 months, and Probability every 3 months. Most recently, Frame was updated on September 23, 2026 and Probability on September 23, 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.*