# PerspCamera vs Probability

The clearest difference is price: Probability at Free against PerspCamera's $9.99. Probability also leads on update cadence (every 10 days vs every 3 months). PerspCamera's advantage is in-app purchases (none vs 1) and review sentiment (20% vs 0%). On ads, device support and iOS requirement there is nothing between them.

Probability is free to download; PerspCamera costs $9.99 up front. Probability sells 1 one-off in-app purchase. PerspCamera asks for nothing beyond the download.

PerspCamera ships an update every 3 months, Probability every 10 days. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | PerspCamera | Probability |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/probability-easy-and-practical/id1625073969/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **20.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 166 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tomohiro Yamashita](https://appshunter.io/developer/658724298) | [Man Hung Sun](https://appshunter.io/developer/1471605573) |

## What reviewers say

### PerspCamera

[App page](https://appshunter.io/ios/app/perspcamera/id927810692)

This utility app assists in creating perspective drawings by using device tilt to calculate perspective lines. It allows users to draw horizontal lines, vanishing points, grids, and cubes based on calculated perspective. Users can set the device's tilt by placing it on a sloped surface and tapping a button.

**Highlights:** Perspective calculation from device tilt, Draw horizontal lines, Vanishing points, Grid generation, Arbitrary cube drawing, Set tilt via device placement

**Features:** Vision Pro support

**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 PerspCamera free?

PerspCamera costs $9.99, with no in-app purchases.

### Is Probability free?

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

### Do PerspCamera or Probability have ads?

Neither PerspCamera nor Probability shows ads.

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

PerspCamera ships an update every 3 months, and Probability every 10 days. Most recently, PerspCamera was updated on October 15, 2026 and Probability on October 5, 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.*