# Probability vs Passify

The clearest difference is update cadence: Probability at every 10 days against Passify's monthly. Probability also leads on iOS requirement (14.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Probability sells 1 one-off in-app purchase and Passify sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Probability ships an update every 10 days, Passify monthly. The most recent releases landed on October 23, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Probability | Passify |
| --- | --- | --- |
| 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 | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 166 MB | 18 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Man Hung Sun](https://appshunter.io/developer/1471605573) | [Blank Cheque Tech Inc.](https://appshunter.io/developer/1701333856) |

## What reviewers say

### 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 |


### Passify

[App page](https://appshunter.io/ios/app/passify/id6458591707)

**Features:** Apple Wallet

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Token | $0.29 | one-time |
| 5 Tokens | $1.95 | one-time |
| 10 Tokens | $2.99 | one-time |
| 20 Tokens | $3.99 | one-time |
| Custom Signing | $9.99 | one-time |


## Frequently asked questions

### Is Probability free?

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

### Is Passify free?

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

### Do Probability or Passify have ads?

Neither Probability nor Passify shows ads.

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

Probability ships an update every 10 days, and Passify monthly. Most recently, Probability was updated on October 23, 2026 and Passify on October 15, 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.*