Comparison

Nerva vs Mind Muscle Mastery

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

Head to head
About

Nerva

This app offers a personalized gut-brain therapy program to manage symptoms of IBS, FD, GERD, and other gut-brain disorders. It aims to retrain the nervous system and improve communication between the gut and brain through daily sessions and practical tools.

Highlights
  • Personalized gut-brain therapy program
  • Daily 15-minute retraining sessions
  • Flare-up management tools
  • Long-term symptom maintenance plan
  • AI-driven personalization
  • Evidence-based clinical research
Features
Read full description

Fix the miscommunication between your gut and brain. Designed for people living with IBS, functional dyspepsia (FD), GERD, bloating symptoms, and other gut–brain disorders - as well as those seeking additional support alongside IBD care - Nerva is a personalized gut–brain program that supports symptom management through daily sessions, practical tools, and structured guidance. Target the root cause Many people spend years cutting out foods in an effort to calm their gut - a difficult path that can miss what’s really driving symptoms. In disorders of gut–brain interaction (DGBIs), the root cause is gut–brain hypersensitivity. After a trigger like illness, antibiotics, or prolonged stress, the nerves in the gut can become over-reactive. Even once the gut tissue heals, the nervous system may keep the alarm turned up. Normal digestion, gas, or movement are then misread as danger - leading to pain, bloating, reflux, urgency, constipation, or diarrhea. Diets and medications can reduce symptoms temporarily, but they don’t retrain this signaling system. That’s why symptoms often return or shift over time. Lasting relief means calming the nervous system and restoring healthy gut–brain communication - where the symptoms actually start. How Nerva helps Nerva is a structured gut–brain program that helps you practice brain-gut techniques shown to support a calmer response to gut sensations. Over the program you'll learn to: - Respond differently to uncomfortable gut signals - Practice calming the gut–brain stress response - Build daily habits that support digestive comfort Tailored to you No two guts are the same. Nerva adapts your program to your symptoms, triggers, and progress - using AI to adjust the coaching and guidance as you go. The sessions, the tools you receive, and the coaching you follow are all shaped around your experience. Evidence-based Unlike most apps, Nerva is built on clinical research. In a randomized controlled trial at Monash University, Nerva helped 81% of people significantly manage their gastrointestinal symptoms. Since then, more than 300,000 people have used Nerva, and over 11,000 healthcare providers recommend it. Features of Nerva - Daily 15-minute sessions designed to retrain gut-brain miscommunication - Flare-up tools for pain, bloating, constipation, reflux and diarrhea - Long-term maintenance plan to keep symptoms under control after the program - AI personalization to tailor the program to your selected triggers and progress Who is the team behind Nerva? Nerva was built by Dr. Simone Peters, GI psychophysiologist, together with clinicians, dietitians, and researchers. Many of us live with gut conditions ourselves. Member stories “Nerva has really worked for me. I’ve been using the app for several months now, and I’ve noticed that I’m experiencing less negative instances with my stomach. I would highly recommend to anyone - absolutely worth the subscription” Disclaimer: Nerva is a self-guided program that may help people self-manage and live well with a diagnosed disorder of the gut-brain interaction. It is not a substitute for professional medical care, diagnosis, or treatment, and has not been evaluated by the FDA, TGA, MHRA, or equivalent bodies. Do not change prescribed medication or treatment without professional advice. Some content is personalized or generated by AI for educational and wellness purposes only. It is not therapy or mental health care, is not from a licensed professional, and is not monitored in real time. If you are in distress or thinking of harming yourself or others, call your local emergency number right away. Subscription and trial 7-day free trial After the trial, your account is charged according to the plan you choose Subscriptions renew until cancelled Cancel anytime in iOS Settings, Apple ID, Subscriptions Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.mindsethealth.com/privacy

About

Mind Muscle Mastery

This app provides comprehensive fitness and mindset coaching to help users achieve physical transformation and mental resilience. It offers custom workouts, nutrition guidance, and progress tracking to foster discipline and results.

Highlights
  • Custom workouts
  • Nutrition guidance
  • Progress tracking
  • Mindset coaching
  • Accountability tools
Features
Read full description

Mind Muscle Mastery is your all-in-one fitness and mindset coaching hub designed to help you build a stronger body and sharper mind. Train with purpose, track your progress, get custom workouts and nutrition guidance, and stay accountable every step of the way. Whether you're chasing physical transformation or mental resilience, this is where discipline meets results. *App access requires a paid coaching plan. Terms Of Use: https://kahunas.io/terms-conditions Privacy Policy: https://kahunas.io/privacy

Screenshots

Nerva4 screens
Mind Muscle Mastery3 screens

Verdict

The call

The clearest difference is update cadence: Nerva at weekly against Mind Muscle Mastery's every 2 months. Nerva also leads on ratings volume (15K vs 1). Mind Muscle Mastery's advantage is rating (5.0 vs 4.7). On price, ads, in-app purchases and monetization model 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. Nerva sells 4 in-app purchases, starting at $43.99 per month and Mind Muscle Mastery sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Mind Muscle Mastery holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Nerva has 15K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Nerva ships an update weekly, Mind Muscle Mastery every 2 months. The most recent releases landed on September 24, 2026 and June 1, 2026 respectively.

Scorecard3 real differences · 7 level
Nerva versus Mind Muscle Mastery: the parameters behind the verdict, then further details
ParameterNervaMind Muscle Mastery
PriceFreeFree
Rating4.7 (15K ratings)5.0 (1 ratings) — better
Positive reviews72.5% of reviews—
Number of ratings15K — better1
Update frequencyWeekly — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size134 MB57 MB
Age rating12+17+
DeveloperMindset Health Pty LtdHunter Fuller

Customer experience

Nerva

All ratings14,789 ratings
Positive93.1%
Neutral3.2%
Negative3.7%
Written reviews867 reviews
Positive72.5%
Neutral6.0%
Negative21.5%

Mind Muscle Mastery

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Nerva

Reported bugs

3 issues
  • App getting stuck on certain days
  • Difficulty accessing previous sessions
  • Inconsistent user experience across devices

Requested features

4 requests
  • More variety in guided visualizations
  • Ability to skip or replace certain sessions
  • Maintenance plan with reduced pricing
  • Offline access to recordings

Mind Muscle Mastery

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Nerva

Subscriptions4
  • Nerva IBS program (Monthly)7 Days trial$43.991 Month
  • 30% Off Nerva IBS (3 Month)7 Days trial$60.993 Months
  • Nerva IBS program (3 Month)7 Days trial$78.993 Months
Show 1 more
  • Nerva Full Access7 Days trial$199.001 Year
1 purchases

Mind Muscle Mastery

Subscriptions1
  • Mind Muscle Mastery Coaching$0.991 Month

Questions

Is Nerva free?
Nerva is free to download, with in-app purchases available.
Is Mind Muscle Mastery free?
Mind Muscle Mastery is free to download, with in-app purchases available.
Which has better reviews, Nerva or Mind Muscle Mastery?
Mind Muscle Mastery is rated higher. Nerva averages 4.7 out of 5 from 15K ratings, while Mind Muscle Mastery averages 5.0 from 1 ratings.
Do Nerva or Mind Muscle Mastery have ads?
Neither Nerva nor Mind Muscle Mastery shows ads.
Which is updated more often, Nerva or Mind Muscle Mastery?
Nerva ships an update weekly, and Mind Muscle Mastery every 2 months. Most recently, Nerva was updated on September 24, 2026 and Mind Muscle Mastery on June 1, 2026.

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