Personal AI Plan
Workouts and nutrition tailored to your goal, level, equipment and city — and to how you recover. Rebuild your plan any time.
Android · version 1.0.0 · 15 languages
Your personal
AI trainer
FitnesBuster builds a workout program and meal plan around your goal, shows which muscles are working, tracks your calories and macros, and helps you stick with it.
AI plan for your goal
3D anatomy
15
interface languages
6
design themes
3D
exercise anatomy
Health
Connect: steps, heart rate, weight
Features
One app instead of a notebook, a calculator and a dozen videos
Everything you need for workouts and nutrition: plan, log, calculations, shopping and support — all in one app.
3D Exercise Anatomy
Before you train, see which muscles are working — primary and supporting. You'll know why each exercise is there and what it does.
Workout Log & Timer
Sets, reps, weight and rest between sets — all logged right as you train.
Nutrition & Macros
Meals with ingredients and gram amounts — plus calories and protein, fat and carbs for the day.
Shopping List
Your weekly groceries build themselves from the meal plan — with quantities and estimated cost.
Progress & Measurements
Weight chart, body measurements, weekly recaps and trends across workouts and nutrition.
Recovery
A readiness check and tips for when your muscles are still sore from the last workout.
Friends & Challenges
Activity feed, weekly leaders and shared goals — with people who train too.
Levels, XP & Badges
XP for workouts and completed goals, levels and a badge collection. Streaks are counted on the server, so you can't fake them.
Works with Health Connect
Steps, heart rate and weight sync from Android's system health store — no manual entry.
Ask the AI in the App
The AI answers from your own plan, not generic internet advice — factoring in your goal, weight and how your muscles recover.
How do I replace an exercise?
How much protein do I need?
What should I eat after a workout?
Screens
What it looks like
Real app screens — no mockups, no renders. Tap any screen to enlarge it.
Swipe to see the rest of the screens
Themes
6 themes — just like in the app
Switch the look with a single tap in the app. Try it here too: tap a theme and this site recolors itself.
Data
What happens to your data
The app handles sensitive information — weight, heart rate, meal plans. That's why everything here is transparent.
Where your data lives
- Profile and workouts — in your personal account, visible only to you.
- AI requests are processed on the server: keys and tokens never live in the app, and rate limits protect against abuse.
- Analytics without personal data — no names, no e-mail, no text of your questions to the AI trainer.
- Account deletion — right in the app, along with your profile data.
This site
- No trackers, no external CDNs — not a single third-party request.
- HTTPS and HSTS, a strict security policy (CSP), and anti-framing protection.
- A signed APK: the build is signed with a permanent developer key — updates install right on top with no data loss.
Questions about data and security: maksim.yugov.89@gmail.com
Download
Install FitnesBuster
A direct Android build. Installs in a couple of steps — the system will prompt you to allow installs from this source automatically.
Version
1.0.0 (released September 10, 2026)
Size
158,137,529 bytes
Requires
Android 8.0 or newer
Architectures
arm64-v8a, armeabi-v7a, x86_64
- Download the fitnesbuster-1.0.0.apk file to your phone.
- Open it and allow installs from this source if the system asks.
- Wait for it to install and sign in — or create an account in a minute.
Point your phone camera —
and the app is already downloading
FAQ
Frequently asked questions
How do I install the APK?
Download the file with the button above, open it on your phone and confirm the install. If Android asks about installing from an unknown source, allow it for the browser or file manager you're opening the file from.
Is it safe?
The build is signed with a permanent developer key and served over HTTPS — there isn't a single third-party request on the page. Android will show the signature during install, and updates install right on top without losing your data.
Why isn't the app on Google Play?
FitnesBuster is an independent one-developer project, distributed directly for now. That way updates ship faster and without store reviews.
What phone and Android version do I need?
Android 8.0 or newer, around 160 MB of free space. Phones on arm64, armv7 and x86_64 are supported.
Is there an iPhone version?
For now, the app is available on Android only.
Do I need an internet connection?
For sign-in, sync, AI plans and friends — yes. An already loaded workout plan and log open offline too, and your data syncs up later.
How do I delete my account and data?
In the app: Profile → Delete account. Your profile data will be deleted. If anything remains, email maksim.yugov.89@gmail.com.