Nerva vs Bia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
Bia
This interactive tool guides users through a step-by-step process to understand and overcome phobias. It utilizes proven therapeutic techniques and offers tailored versions for adults and children, with options to connect with a therapist.
- Step-by-step phobia overcoming guidance
- Exposure and Response Prevention (ERP) techniques
- Acceptance and Commitment Therapy (ACT) principles
- Cognitive Behavioral Therapy (CBT) methods
- Tailored versions for adults and kids
- Therapist connection option
- Parental resources
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You deserve a life free from phobia. Bia is a step-by-step interactive tool for learning about and overcoming phobia. Based on researched techniques from Exposure and Response Prevention Therapy (ERP), Acceptance and Commitment Therapy (ACT), and Cognitive Behavioral Therapy (CBT), Bia teaches you the science behind phobia and guides you through a personalized, evidence-based program to overcome it. Note: Bia is free to try for 7 days and then requires a subscription. HOW IT WORKS Bia creates your personalized phobia recovery program based on your unique fear profile. As you work through the program, Bia's guided exposure algorithm enforces clinical best practices of ERP to keep you progressing at the right pace. You're always in control, there are no hidden tricks or unexpected exposures. SELF-GUIDED OR WITH A THERAPIST Many users complete their Bia journey independently. Others prefer to use Bia alongside a therapist in order to accelerate their recovery. Bia is designed to support you in whichever option you choose. REAL RESULTS 86% of users report reduced phobia severity • Most users see improvement within 2 weeks OUR STORY Bia was founded by Willy Schaller, who lived with emetophobia for over 27 years before recovering using the same method now built into the app. Co-founder Elizabeth Fullerton was one of Bia's first users and found the tool so impactful in her own phobia recovery that she joined the team. CLINICAL CREDIBILITY Bia is developed in partnership with our clinical advisory board consisting of Dr. David Russ, Dr. Laura Berssenbrugge, Jamie Roche LCSW, Nancy Lagunas AMFT, and Kaitlyn Peters LPCC. Alongside our research partners from the University of Utah, we have presented Bia's outcomes data at national psychological conferences including ADAA 2026, NASP 2026, and WCCBT 2026. WHAT BIA HELPS WITH Bia offers a dedicated recovery program for the following conditions: • Emetophobia (fear of vomiting) • Panic disorder • Agoraphobia • Social anxiety • Contamination OCD • Fear of flying • School phobia and school refusal • Separation anxiety • School performance anxiety • Other phobias are supported through custom-built programs. FEATURES Separate kids version for children ages 5-13 • Guided exposure algorithm • Safety behavior tracking • Generate your unique fear profile • Customizable reminders for exposure practice • Interactive exposure games • Create Custom Exposure Exercises • Custom goals and progress tracking • Optionally link your account with your therapist GETTING STARTED Bia offers a 7-day risk-free trial. Working with a therapist? Ask if you qualify for free access through your therapy. You deserve a life free from pho(bia). Start your recovery today. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is monetization model: Nerva at free with in-app purchases against Bia's subscription. Nerva also leads on update cadence (weekly vs every 2 months) and ratings volume (15K vs 21). Bia's advantage is review sentiment (86% vs 73%). On price, rating, ads and in-app purchases 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. Nerva sells 4 in-app purchases, starting at $43.99 per month and Bia sells 5 in-app purchases, starting at $29.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for Nerva against 4.7 for Bia. That said, the two scores are not equally well evidenced: Nerva has 15K ratings behind it against 21, so its average is the more settled of the two. Written reviews are what separate them: 73% of Nerva's written reviews are positive against 86% of Bia's.
Nerva ships an update weekly, Bia every 2 months. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.
| Parameter | Nerva | Bia |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (15K ratings) | 4.7 (21 ratings) |
| Positive reviews | 72.5% of reviews | 85.7% of reviews — better |
| Number of ratings | 15K — better | 21 |
| Update frequency | Weekly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Best chart rank | #199 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 134 MB | 1 MB |
| Age rating | 12+ | 12+ |
| Developer | Mindset Health Pty Ltd | MyTherapy LLC |
Customer experience
Nerva
Bia
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
Bia
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nerva
- 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
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- Nerva Full Access7 Days trial$199.001 Year
Bia
- Monthly7 Days trial$29.991 Month
- Monthly$29.991 Month
- Yearly$149.991 Year
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- Yearly7 Days trial$149.991 Year
- Lifetime$299.99









