# Probability Toolkit vs Handwriting to Text Speech Pro

The clearest difference is price: Probability Toolkit at $1.99 against Handwriting to Text Speech Pro's $19.99. Probability Toolkit also leads on iOS requirement (12.0 vs 15.0). Handwriting to Text Speech Pro's advantage is device support (3 vs 1). On update cadence, ads and in-app purchases there is nothing between them.

Probability Toolkit costs $1.99 and Handwriting to Text Speech Pro $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Probability Toolkit ships an update every 10 months, Handwriting to Text Speech Pro every 17 months. The most recent releases landed on May 17, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Probability Toolkit | Handwriting to Text Speech Pro |
| --- | --- | --- |
| Price | **$1.99** | $19.99 |
| Rating | — | **[4.6 (7 ratings)](https://appshunter.io/ios/app/handwriting-to-text-speech-pro/id1495862222/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 17 months |
| Monetization | — | Paid |
| Size | 41 MB | 10 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Muhammad Mohsin](https://appshunter.io/developer/1133941910) |

## What reviewers say

### Probability Toolkit

[App page](https://appshunter.io/ios/app/probability-toolkit/id652216774)

**Features:** macOS Compatibility

**In-app purchases:** none


### Handwriting to Text Speech Pro

[App page](https://appshunter.io/ios/app/handwriting-to-text-speech-pro/id1495862222)

Convert handwritten notes and text from paper into editable digital text. This app also offers a speech function to read the recognized text aloud on your device with a single click.

**Highlights:** Handwriting recognition, Text to speech, Optical Character Recognition (OCR), Convert paper notes to editable text, One-click recognition and speech

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Probability Toolkit free?

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

### Is Handwriting to Text Speech Pro free?

Handwriting to Text Speech Pro costs $19.99, with no in-app purchases.

### Do Probability Toolkit or Handwriting to Text Speech Pro have ads?

Neither Probability Toolkit nor Handwriting to Text Speech Pro shows ads.

### Which is updated more often, Probability Toolkit or Handwriting to Text Speech Pro?

Probability Toolkit ships an update every 10 months, and Handwriting to Text Speech Pro every 17 months. Most recently, Probability Toolkit was updated on May 17, 2026 and Handwriting to Text Speech Pro on June 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*