Knee rehab on your terms
You're broken right now, but not defeated.
You adapt to your pain. You find a way forward.
You're not a victim of your injury — you're a warrior recovering.
You're broken right now, but not defeated.
You adapt to your pain. You find a way forward.
You're not a victim of your injury — you're a warrior recovering.
Most knee rehab apps give you exercises and disappear. No feedback. No adaptation. No sense of progress.
Your physio gave you exercises. Now you're alone. You don't know if you're doing them right. You don't know if you're getting better. You just... keep going, hoping for the best.
Did you do your exercises today? How many reps? How much discomfort? You can't remember. You have no data. So you can't tell if you're progressing or stuck.
Some days your knee feels okay. Other days it's swollen. But your programme stays the same. You're told to "push through" or "take it easy" — but no one tells you when, or how much.
Ninja Train turns your rehab into data. You see exactly what you did, how you felt, and how you're improving.
Log which exercises you did, how many reps, and how much discomfort you felt. Takes 10 seconds. Builds a complete picture of your rehab journey.
Weekly charts show your adherence (how often you did exercises) and discomfort (how your knee responded). Spot trends. Celebrate improvements. Catch setbacks early.
Your streak shows how many days in a row you've done exercises. It's not about perfection — it's about consistency. Miss a day? Streak resets. But you can always start again.
Don't see an exercise in the catalog? Add your own. Custom exercises fit your specific needs. Modify weights, reps, sets — whatever your rehab requires. You're not locked into a preset programme.
Your knee isn't the same every day. Your rehab shouldn't be either.
Most apps treat every day the same. Ninja Train lets you log discomfort (0-10 scale) after each exercise. Over time, you see patterns:
You see the data. You decide when to push, when to rest, when to change exercises. No more guessing. No more blind obedience to a programme that doesn't fit.
Browse the exercise catalog. Add exercises to your programme. Start with what your physio recommended, or explore on your own. Don't see what you need? Add your own custom exercises with your own weights, reps, and sets.
Follow your programme. Mark exercises as done. Log how many reps. Rate your discomfort (0-10). Takes 2 minutes.
Check your streak. Review weekly charts. See your adherence and discomfort trends. Adjust your programme based on data, not guesswork.
Daily reminders keep you on track. Streaks motivate consistency. Progress charts show you're getting better — or flag when something's wrong.
A ninja doesn't wait for rescue. A ninja uses what's around them — their body, their data, their streak — to recover.
You're resourceful. You adapt. You track your pain, you adjust your exercises, you find a way forward. Ninja Train is the tool. You're the warrior.
Built by someone who's been through knee rehab. Who knows what it means to be broken but not defeated. Who created the app she needed when the system failed her.
This is your path. Walk it like a ninja.
Ninja Train works offline after installation. Feels like a native app. No app store needed.
1. Tap the Share button (□→)
2. Scroll down → "Add to Home Screen"
3. Tap "Add"
1. Tap the three-dot menu (⋮)
2. Tap "Add to Home screen"
3. Tap "Add"
You're broken, not defeated. Track your progress. Adapt to your pain. Recover like a ninja.
Meet Ninja →