Comparison

Rehabbit vs Zero

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

Head to head
About

Rehabbit

This app assists patients with injury recovery by providing structured exercise plans, progress tracking, and injury information. It also facilitates scheduling appointments with licensed physical therapists.

Highlights
  • Personalized rehab plans
  • Exercise tracking and logging
  • Injury information resources
  • Progress visualization charts
  • Physical therapist appointment scheduling
  • Daily exercise reminders
Read full description

Rehabbit is a free climbing rehab app that helps patients track exercises, learn about injuries, and connect with licensed physical therapists. Patients can learn more about their injuries by selecting one of our pre-built rehab plans and choosing which exercises they'd like to do. Each day, Rehabbit will send reminders and schedule what exercises to do. For each exercise, we provide instructions and images, and also enable the patient to modify the intensity as needed (i.e, number of sets, reps weight). Over time, as patients use the app, they will be able to see their progress in Rehabbit. Charts indicating pain over time, exercises logged, and any modifications made during. Patients can also schedule appointments with physical therapists through the app - which will send an email to both the patient and the therapist upon confirmation. As of now, appointments take place outside of the app, your therapist will contact you separately to confirm the details. NOTE: REHABBIT DOES NOT PROVIDER MEDICAL ADVICE NOR AIMS TO. While we hope the information we provide is helpful in your healthcare journey, it is no substitute for professional medical advice and we strongly advise you to talk to your primary care provider before beginning exercise.

About

Zero

Features
Read full description

ZERO-G transforms your daily workouts into immersive mission days aboard the Mothership. Each morning you’re briefed on a critical system failure—then complete 6 focused missions (Strength, Endurance, Mobility, Stability, Balance, Recovery) to stabilize the ship and keep the crew alive. What makes ZERO-G different? Camera Vision – on-device pose detection for form checks, rep counting, and posture alignment. Earn a Form Clean badge when your technique is safe and strong. Personal AI Coach – natural voice briefings keep the mission moving, give real-time cues during sets, answer quick questions, and motivate you hands-free. AI-generated missions – every day brings a fresh storyline, dynamically created from real astronaut training and spacecraft incidents. Talk to Mothership – your AI companion for guidance, motivation, or just everyday questions. Drift Mode – precision warm-up exercises powered by iPhone gyroscope and accelerometer. Challenge Mode – multiplayer duels where you compete with other users in real time. Points & Streaks – earn G Points for every task and keep your streak alive to rise through crew ranks. Mission Log & Calendar – review your completed missions, track missed days, and celebrate personal records. Smart Notifications – daily reminders and community event alerts keep you engaged. How a day works Briefing – the Mothership reports today’s crisis. Pre-brief context – why the mission matters and what you’ll do. Mission – e.g. Hydraulic Squats (15 reps, 40s). Camera overlay tracks joints, AI coach gives live cues. Debrief – instant points, streak updates, and rank progress. Subscription Information ZERO-G requires a subscription to unlock premium features. Title: ZERO-G Subscription Length: 1 Month / 1 Year Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled 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. You can manage or cancel your subscription in your App Store account settings after purchase. Privacy Policy: https://zero-g.app/privacy Terms of Use: https://zero-g.app/terms Disclaimer ZERO-G provides general fitness guidance and is not a medical app. Always consult a healthcare professional before starting any new exercise program. All camera analysis runs locally on your device. No workout videos are uploaded or stored externally.

Screenshots

Rehabbit4 screens
Zero4 screens

Verdict

The call

The clearest difference is in-app purchases: Rehabbit at none against Zero's 2. On price, update cadence, ads 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. Zero sells 2 in-app purchases, starting at $9.99 per month. Rehabbit asks for nothing beyond the download.

UpkeepUpdate frequency

Rehabbit ships an update every 2 days, Zero every 3 days. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

Scorecard1 real difference · 8 level
Rehabbit versus Zero: the parameters behind the verdict, then further details
ParameterRehabbitZero
PriceFreeFree
Rating5.0 (5 ratings) — better—
Number of ratings5 — better—
Update frequencyEvery 2 days — betterEvery 3 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS17.0 — better18.1
Further details — not scored
Size59 MB56 MB
Age rating17+4+
DeveloperMikkel KimBARTOSZ IDZIK

In-app purchases

None

Rehabbit

No in-app purchases

2 purchases

Zero

Subscriptions2
  • Monthly3 Days trial$9.991 Month
  • Annual3 Days trial$79.991 Year

Questions

Is Rehabbit free?
Rehabbit is free to download, with no in-app purchases.
Is Zero free?
Zero is free to download, with in-app purchases available.
Do Rehabbit or Zero have ads?
Neither Rehabbit nor Zero shows ads.
Which is updated more often, Rehabbit or Zero?
Rehabbit ships an update every 2 days, and Zero every 3 days. Most recently, Rehabbit was updated on October 24, 2026 and Zero on October 17, 2026.

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