# StopStutter Speech Therapy vs Kaizen

The clearest difference is update cadence: Kaizen at every 2 days against StopStutter Speech Therapy's weekly. StopStutter Speech Therapy's advantage is iOS requirement (15.0 vs 26.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. StopStutter Speech Therapy sells 10 in-app purchases, starting at $29.00 per month and Kaizen sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

StopStutter Speech Therapy ships an update weekly, Kaizen every 2 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | StopStutter Speech Therapy | Kaizen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (122 ratings)](https://appshunter.io/ios/app/stopstutter-speech-therapy/id6502597917/reviews)** | — |
| Number of ratings | **122** | — |
| Positive reviews | 95.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 138 MB | 13 MB |
| Requires iOS | **15.0** | 26.1 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [World Stop Stuttering Association](https://appshunter.io/developer/1746061038) | [Noe DUBOSQ](https://appshunter.io/developer/6818790941) |

## What reviewers say

### StopStutter Speech Therapy

[App page](https://appshunter.io/ios/app/stopstutter-speech-therapy/id6502597917)

This app helps users overcome stuttering through a neuroscience-based method. It offers guided practice, masterclasses, and a supportive community to build fluency and confidence.

**Highlights:** Neuroscience Method® for retraining speech habits, Certified ex-stutterer therapists, Fluency Masterclasses with video instruction, Daily routine tracking and practice tools, Supportive community of ex-stutterers, AI-powered stuttering question chatbot, Affirmations and guided hypnosis for fluency

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Path to Fluency | $29.00 | per month |
| SELF LEARNING TRACK - MONTHLY | $39.00 | per month |
| Fluency Monthly – App+Website | $39.99 | per month |
| Fluency 6-Month | $79.00 | per 6 months |
| GUIDED LEARNING TRACK - MONTHLY | $99.00 | per month |
| Yearly Path to Fluency | $229.00 | per year |
| SELF LEARNING TRACK - ANNUALLY | $299.00 | per year |
| Fluency Yearly – App + Website | $299.00 | per year |
| GUIDED LEARNING TRACK - ANNUALLY | $799.00 | per year |
| 5 Therapy Sessions | $444.99 | one-time |

**What reviewers like**

- ✨ Life-changing for stutterers
- 🚀 Effective methods and tools
- 🧠 Neuroscience-based approach
- 📚 Abundant resources library
- 🤝 Supportive community

**What reviewers complain about**

- 🐛 Phone times out during affirmations
- ⚠️ Can be overwhelming initially

**Reported bugs**

- No access to materials after payment (reported by one user).

**Requested features**

- Consider a dark mode option for the app.
- Improve the functionality of the affirmation playback to prevent phone timeout.


### Kaizen

[App page](https://appshunter.io/ios/app/kaizen-progressive-overload/id6818790939)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kaizen pro lifetime | $59.99 | one-time |


## Frequently asked questions

### Is StopStutter Speech Therapy free?

StopStutter Speech Therapy is free to download, with in-app purchases available.

### Is Kaizen free?

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

### Do StopStutter Speech Therapy or Kaizen have ads?

Neither StopStutter Speech Therapy nor Kaizen shows ads.

### Which is updated more often, StopStutter Speech Therapy or Kaizen?

StopStutter Speech Therapy ships an update weekly, and Kaizen every 2 days. Most recently, StopStutter Speech Therapy was updated on November 4, 2026 and Kaizen on October 31, 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.*