StopStutter Speech Therapy vs Kaizen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StopStutter Speech Therapy
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.
- 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
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Stop Stuttering, Love Speaking, and Convert Stuttering into a Blessing. Our mobile app will enable you to break free from the chains of stuttering and live the fluent life you deserve. Join 100s of EX-stutterers who have achieved fluency by practicing The Neuroscience Method® to Stop Stuttering. TRY APP FOR FREE. WHY CHOOSE STOPSTUTTER? ● The Neuroscience Method® : Based on neuroplasticity, the Neuroscience Method® to Stop Stuttering enables stutterers to retrain their minds to hear and think in fluency, while replacing the old stuttering-habit with a new fluency-habit. Created by Lee G. Lovett, author of seven ground-breaking Amazon stuttering books, who has personally provided 10,000 hours of stuttering therapy, all no charge, and is a passionate advocate for global stutterers. ● Certified Stuttering Therapy: Unlike Speech Therapists who never stuttered or still do, our Certified Stuttering Therapists are EX-stutterers who mastered our methods and then completed a rigorous certification program to provide stuttering therapy. ● Fluency Masterclasses: Watch Lee Lovett’s “Stop Stuttering MasterClass I & II,” “Beat Fear MasterClass,” and “Parents of Stutterers MasterClass.” 50 hours of video instruction will equip you and/or your children for fluency. ● Daily Routine: Track stuttering victories and setbacks. Practice speech tools, mind training, and reading aloud. Watch your confidence build as your consecutive victory days propel you to fluency. ● Supportive Community: Connect with EX-stutterers and those fast-becoming EX-stutterers at daily practice sessions and weekly speech club meetings. Get advice, encouragement, support, inspiration and make lifelong friends. ● AI-Powered Assistance: Get instant answers to your stuttering questions from our AI-powered chatbot, drawing exclusively from the Neuroscience Method® database of books, MasterClasses, videos and website. ● Comprehensive Resources: Access eBooks, video library, stuttering therapy, guided hypnosis, 100s of testimonials, and everything needed to ensure your success. STOP STUTTERING INCIDENTS Learn and apply our revolutionary speech tools/techniques and speech plans to prevent stuttering incidents – one day at a time. RETRAIN YOUR MIND WITH AFFIRMATIONS & HYPNOSIS Listen to your personally recorded affirmations, and combine with our guided hypnosis, to retrain your mind to think, hear, and speak fluently. JOIN HUNDREDS WHO HAVE FOUND FLUENCY Watch and read hundreds of stopped stuttering stories – irrefutable proof that our Methods work. Stutterers of all ages, ethnicities, and cultures have found fluency and life transformation. YOU CAN TOO! PRICING POLICY StopStutter offers a 7-day free trial with full access to all premium features. After the trial, you can choose from our flexible learning plans: Self Learning – Monthly ($39/month), Self Learning – Yearly ($299/year), Guided Learning – Monthly ($99/month), or Guided Learning – Yearly ($799/year). Each plan gives you seamless access to both the mobile app and website using the same login, allowing you to continue your speech program anytime, anywhere. Prices may vary depending on your region. TERMS OF USE: • Payment will be charged to iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication. Terms of Use - https://app.stopstutter.org/terms-condition.html Privacy Policy - https://app.stopstutter.org/privacy-policy.html
Kaizen
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Science-based lifting, built on progressive overload. Kaizen is a strength training tracker built around one idea: get a little better every week. Log your sets, and Kaizen tells you what to lift next time. No guesswork, no spreadsheets. KNOW WHAT TO BEAT Every set shows your target from last time. Hit the top of your rep range on every set and Kaizen adds weight. Fall short and it holds the load until you get there. That's double progression, the method coaches use, done for you. TRAIN BY EFFORT Rate each set with RPE (rate of perceived exertion). Kaizen uses it to calibrate your starting weights in week one, to adjust your targets, and to warn you when you're pushing too hard. BUILD ANY SPLIT Push Pull Legs (same days twice or A & B versions), Upper / Lower, Full Body, Bro split or your own. Pick your exercises, set your sets, and put your weak point first. SEE YOUR PROGRESS • Estimated 1RM, top set and volume charts for every lift • Personal records by rep count • Hard sets per muscle each week • A month view of every session and deload week FIX PLATEAUS EARLY When a lift stalls for three sessions, Kaizen spots it and gives you clear options: reset the reps, take a deload week or swap the exercise. DAILY CHECK-IN Thirty seconds each morning: bodyweight, sleep, energy and soreness. Kaizen turns it into a readiness score, so you know when to push and when to ease off. PRIVATE BY DESIGN Your body data (weight, height, body fat, sleep, energy, soreness) stays on your iPhone. Your workouts sync to your account so you never lose them. Delete your account and data at any time from Settings. Light and dark mode. Available in English and French. KAIZEN PRO Start with a 7-day free trial. Then choose monthly, 3 months, yearly or a one-time lifetime purchase. Prices are shown in the app in your local currency. Payment is charged to your Apple ID account when you confirm the purchase, or at the end of the free trial. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings at any time. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kaizen.dbsq.fr/privacy/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | StopStutter Speech Therapy | Kaizen |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (122 ratings) — better | — |
| Positive reviews | 95.9% of reviews | — |
| Number of ratings | 122 — better | — |
| Update frequency | Weekly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 15.0 — better | 26.1 |
| Further details — not scored | ||
| Size | 138 MB | 13 MB |
| Age rating | 4+ | 12+ |
| Developer | World Stop Stuttering Association | Noe DUBOSQ |
Bugs and requests
StopStutter Speech Therapy
Reported bugs
1 issue- No access to materials after payment (reported by one user).
Requested features
2 requests- Consider a dark mode option for the app.
- Improve the functionality of the affirmation playback to prevent phone timeout.
Kaizen
Not enough reviews yet to summarise bugs or requests.
In-app purchases
StopStutter Speech Therapy
- Monthly Path to Fluency7 Days trial$29.001 Month
- SELF LEARNING TRACK - MONTHLY7 Days trial$39.001 Month
- Fluency Monthly – App+Website7 Days trial$39.991 Month
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- Fluency 6-Month7 Days trial$79.006 Months
- GUIDED LEARNING TRACK - MONTHLY7 Days trial$99.001 Month
- Yearly Path to Fluency7 Days trial$229.001 Year
- SELF LEARNING TRACK - ANNUALLY7 Days trial$299.001 Year
- Fluency Yearly – App + Website7 Days trial$299.001 Year
- GUIDED LEARNING TRACK - ANNUALLY7 Days trial$799.001 Year
- 5 Therapy Sessions$444.99
Kaizen
- Kaizen pro lifetime$59.99









