# Simple TTS vs Greatest Common Divisor PRO

The clearest difference is price: Simple TTS at Free against Greatest Common Divisor PRO's $1.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Simple TTS is free to download; Greatest Common Divisor PRO costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Simple TTS ships an update every 2 months, Greatest Common Divisor PRO every 5 weeks. The most recent releases landed on October 6, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Simple TTS | Greatest Common Divisor PRO |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.5 (4 ratings)](https://appshunter.io/ios/app/simple-tts/id6469903380/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 23 MB | 179 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mew Sang Lim](https://appshunter.io/developer/1471783562) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Simple TTS

[App page](https://appshunter.io/ios/app/simple-tts/id6469903380)

Convert text into natural-sounding speech with a variety of voices and languages. Customize speech settings and export audio files for various uses, from study aids to content creation.

**Highlights:** Natural sounding voices, Versatile text input, Multilingual support, Customizable speech rate, pitch, and volume, Export audio files, Play/Stop/Pause voice control

**Features:** Vision Pro support

**In-app purchases:** none


### Greatest Common Divisor PRO

[App page](https://appshunter.io/ios/app/greatest-common-divisor-pro/id6802801796)

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

**In-app purchases:** none


## Frequently asked questions

### Is Simple TTS free?

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

### Is Greatest Common Divisor PRO free?

Greatest Common Divisor PRO costs $1.99, with no in-app purchases.

### Do Simple TTS or Greatest Common Divisor PRO have ads?

Neither Simple TTS nor Greatest Common Divisor PRO shows ads.

### Which is updated more often, Simple TTS or Greatest Common Divisor PRO?

Simple TTS ships an update every 2 months, and Greatest Common Divisor PRO every 5 weeks. Most recently, Simple TTS was updated on October 6, 2026 and Greatest Common Divisor PRO on October 29, 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.*