Comparison

StutterFlow Stuttering Therapy vs Voixx

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

StutterFlow Stuttering Therapy

This app offers daily speech practice using Delayed Auditory Feedback (DAF) to help individuals who stutter speak more smoothly. It includes tailored exercises for specific sounds and sentences, habit-building features, and progress tracking. The tool is designed for personal practice alongside professional therapy.

Highlights
  • Delayed Auditory Feedback (DAF) modes
  • Sound and word practice exercises
  • Sentence and phrase practice
  • Daily habit building with streaks and medals
  • Progress tracking and statistics
  • Personalized content based on user goals
Features
Read full description

StutterFlow is a daily speech-practice companion for people who stutter. It is built around DAF — Delayed Auditory Feedback — a technique studied since the 1950s that plays your own voice back through headphones with a short delay. Many people find that this naturally slows speech and helps it flow more smoothly, with fewer blocks and repetitions. This is a practice tool, not a cure, and it does not replace consultation with a speech-language pathologist. Use it alongside therapy or as a daily way to keep your speech moving. WHAT'S INSIDE DAF Modes Choose a delay that fits how you speak today — from a light, barely-noticeable 50 ms up to a deeper 200 ms for focused sessions. Put on AirPods or wired headphones, tap a mode, and speak naturally. Sound Practice Train the sounds that trip you up — P, T, K, R and more. Each sound comes with a simple technique, a clear tip, and a set of words to work through at your own pace. Sentence Gym Move from single sounds to full phrases and sentences. Pair it with DAF to carry smoother speech into real, everyday talking. Build a Daily Habit Streaks, medals and a practice calendar help you show up every day — because consistency is what makes the method work. See Your Progress Simple stats show how your practice adds up week by week, so you can feel the momentum. Made for You Tell us whether you're an adult, a teen, or a parent practising with a child, which sounds are hardest, and your goal — everyday speech, public speaking, or support between therapy visits. StutterFlow tailors the materials around your answers. PRIVATE BY DESIGN Your microphone is processed only on your iPhone. Your voice never leaves your device, and there are no accounts to create. STUTTERFLOW PRO A free trial unlocks the full course — every sound and sentence, streaks and medals, stats and reminders. Continue monthly or yearly, or unlock lifetime access with a single one-time purchase. Cancel anytime in iPhone Settings. Note: subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel your subscription in iPhone Settings → Apple ID → Subscriptions. Medical disclaimer: StutterFlow is a self-practice tool and does not replace the consultation, diagnosis, or treatment of a qualified speech-language pathologist. Privacy Policy: https://stutterflow.com/en/privacy Terms of Service: https://stutterflow.com/en/terms

About

Voixx

Features
Read full description

Speak like a man people stop for. Not louder. Lower, slower, and without the "um" that hands the floor to whoever wants it. That voice is trainable, and 84 days is what it takes. Right now, a room reads you before you finish your first sentence. It hears speed, pitch and hesitation, and it decides how much weight you get. Most men lose that read without ever knowing it happened. Voixx tells you exactly where you stand in thirty seconds, then rebuilds it. TALK FOR THIRTY SECONDS. GET FIVE NUMBERS. Pace, in words per minute. Men who get talked over are running at 180 without knowing it, because the speed feels normal from the inside. Crutches, counted and named. You said like 34 times in 94 seconds, and you can replay every single one of them. Pitch, in hertz. The adult male median is 116. You will see how far above it you sit. Resonance, in centimeters of formant dispersion. This is the one nobody else measures and the one that decides whether your voice fills a room or dies at the third chair. Pauses, as a share of your speech. Silence is the part almost nobody uses, and it is the cheapest authority you can buy. WHAT CHANGES By week two, the "um" is gone and you stop racing. People stop finishing your sentences. By week six, your pitch has dropped 12 to 18 hertz and your resonance has opened. You sound bigger than you did, because you are moving the two things that make a voice sound big. By week twelve, you play your first take against your latest and hear the distance. Most men do not believe it is the same person. Deeper. Slower. Harder to interrupt. That is the whole product. THE 84 DAYS One session a day, five to fifteen minutes. Weeks 1 to 3, pace and pauses. These move first and they move fastest. Weeks 4 to 6, resonance. Weeks 7 to 9, crutches. Weeks 10 to 12, holding all of it when you are under pressure. You re-record every week, so the change is measured and not imagined. THIS IS FOR YOU IF You get cut off in group conversations. You speed up when you are nervous, and you can hear yourself doing it. You say like every third word and cannot stop. You have never made it through a recording of your own voice. WHAT IT IS NOT No breathing rituals. No affirmations. No scripts to memorize. Nothing here touches your accent, and nothing should. Your anatomy is fixed and we will not pretend otherwise. Habits are not, and habits are most of what people actually hear. That is the part we move, and we show you the numbers while it moves. VOIXX PRO The full 84 days, the exercise library, the weekly re-measure and the coach. Twelve weeks, or the year that follows with it. SUBSCRIPTION AND TERMS Voixx Pro is an auto-renewable subscription. Each plan, its length and its price appear on the subscription screen before you pay, in your own currency. Payment is charged to your Apple Account at confirmation. It renews unless you turn auto-renew off at least 24 hours before the period ends, in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://voixx.julienmontagne.com/privacy

Screenshots

StutterFlow Stuttering Therapy4 screens
Voixx4 screens

Verdict

The call

The clearest difference is update cadence: Voixx at every 2 days against StutterFlow Stuttering Therapy's every 9 days. 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. StutterFlow Stuttering Therapy sells 3 in-app purchases, starting at $9.99 per month and Voixx sells 2 in-app purchases, starting at $39.99 per 3 months. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

StutterFlow Stuttering Therapy ships an update every 9 days, Voixx every 2 days. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

Scorecard1 real difference · 9 level
StutterFlow Stuttering Therapy versus Voixx: the parameters behind the verdict, then further details
ParameterStutterFlow Stuttering TherapyVoixx
PriceFreeFree
Rating3.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 9 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS17.016.4 — better
Further details — not scored
Size8 MB49 MB
Age rating4+4+
DeveloperAleksandr ChizhevskiyJulien Montagne

In-app purchases

3 purchases

StutterFlow Stuttering Therapy

Subscriptions2
  • Monthly Subscription3 Days trial$9.991 Month
  • Yearly Subscription3 Days trial$39.991 Year
One-time1
  • Lifetime Access$69.99
2 purchases

Voixx

Subscriptions2
  • Voixx Quarterly7 Days trial$39.993 Months
  • Voixx Annual7 Days trial$79.991 Year

Questions

Is StutterFlow Stuttering Therapy free?
StutterFlow Stuttering Therapy is free to download, with in-app purchases available.
Is Voixx free?
Voixx is free to download, with in-app purchases available.
Do StutterFlow Stuttering Therapy or Voixx have ads?
Neither StutterFlow Stuttering Therapy nor Voixx shows ads.
Which is updated more often, StutterFlow Stuttering Therapy or Voixx?
StutterFlow Stuttering Therapy ships an update every 9 days, and Voixx every 2 days. Most recently, StutterFlow Stuttering Therapy was updated on October 11, 2026 and Voixx on October 8, 2026.

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