You're doing exercises. But you don't know if they're working.
You feel alone. You're not sure if you should push through or stop.
What if your rehab adapted to how you actually feel?
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.
Knee rehab is a marathon, not a sprint. You need a system that supports you every day — not just when you remember.
Ninja Train is built by someone who's been through knee rehab. Who knows the frustration of feeling abandoned. Who wanted a better way to track progress and adapt to pain.
This is that better way.
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"
Stop feeling abandoned. Start tracking. Adapt to your pain. See your progress.
Start Your Recovery →