# Turtle vs Probability

The clearest difference is in-app purchases: Turtle at none against Probability's 1. Probability's advantage is update cadence (every 10 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Probability sells 1 one-off in-app purchase. Turtle asks for nothing beyond the download.

Turtle ships an update every 3 months, Probability every 10 days. The most recent releases landed on November 28, 2025 and September 4, 2026 respectively.

## The numbers

| Metric | Turtle | Probability |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/probability-easy-and-practical/id1625073969/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 25 MB | 166 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHENGWEN WU](https://appshunter.io/developer/1558080152) | [Man Hung Sun](https://appshunter.io/developer/1471605573) |

## What reviewers say

### Turtle

[App page](https://appshunter.io/ios/app/turtle/id1558080150)

**In-app purchases:** none


### Probability

[App page](https://appshunter.io/ios/app/probability-easy-and-practical/id1625073969)

Enhance your decision-making skills by learning to assess probabilities with this app. It offers formulas for problem-solving, note-taking capabilities, and interactive tools like dice and coin tosses for practical learning.

**Highlights:** Probability assessment, Decision-making improvement, Problem-solving formulas, Personalized notes, Dice and coin toss simulations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $0.99 | one-time |


## Frequently asked questions

### Is Turtle free?

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

### Is Probability free?

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

### Do Turtle or Probability have ads?

Neither Turtle nor Probability shows ads.

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

Turtle ships an update every 3 months, and Probability every 10 days. Most recently, Turtle was updated on November 28, 2025 and Probability on September 4, 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.*