Best Fitness Tracking App
We put the most popular fitness apps through their paces — judging on logging speed, AI smarts, personalisation, value, and most importantly: whether real people stick with them.
Written by the nibFIT team. We've tried to be fair. We've also tried to win.
The quick answer
There's no single "best" fitness app for everyone — the right one depends on what you actually want to track. Here's how we've cut it:
Feature comparison
| Feature | nibFIT | Noom | Fitbit | Whoop | Apple Fitness+ |
|---|---|---|---|---|---|
| AI meal logging | ✓ Camera + voice | ✗ Manual | ~ Basic scan | ✗ No food tracking | ✗ No food tracking |
| Calorie & macro tracking | ✓ | ✓ | ✓ | ✗ | ✗ |
| AI coaching / tips | ✓ Daily, personalised | ✓ Psychology-based | ✗ | ~ Recovery advice | ✗ |
| AI workout plan | ✓ Generated for you | ✗ | ✗ | ✗ | ✓ Video workouts |
| Workout logging | ✓ Gym + cardio | ~ Basic | ✓ | ✓ | ✓ |
| Apple Health sync | ✓ Steps + cals | ✓ | ✓ | ✓ | ✓ Native |
| Requires hardware | ✓ iPhone only | ✓ App only | ✗ Fitbit device | ✗ Whoop band | ✗ Apple Watch ideal |
| Weight trend tracking | ✓ Visual chart | ✓ | ✓ | ✗ | ✗ |
| Sleep & recovery | ✗ | ~ | ✓ | ✓ Best in class | ~ |
| HRV & readiness score | ✗ | ✗ | ~ | ✓ | ✗ |
In-depth reviews
Strengths
- Fastest meal logging of any app tested — camera or voice
- Genuinely useful daily AI coaching tip (not generic fluff)
- AI workout plan tailored to your goals, kit, and schedule
- Calorie maths updates as your weight changes
- Integrates Apple Health active calories into "Actual Calories"
- Clean, ad-free design that feels premium
- One subscription, everything included — no feature tiering
Limitations
- iOS only (Android coming)
- No sleep or HRV tracking
- No wearable integration beyond Apple Health
- No web app or desktop access
Strengths
- Psychology and behaviour-change focus
- Human coaches available (at higher tiers)
- Good for people whose issue is mindset, not knowledge
- Colour-coded food system is genuinely useful for beginners
Limitations
- Extremely expensive for what you get
- Aggressive and confusing cancellation flow
- No camera or voice logging
- No workout planning or exercise logging
- Course content feels repetitive after a few weeks
Strengths
- Excellent wearable + app integration
- Solid sleep tracking and heart rate data
- Good step counting and activity rings
- Reasonable Premium price
Limitations
- Requires a Fitbit device to unlock most features
- Food logging is clunky — no AI analysis
- Google's direction post-acquisition is uncertain
- No AI workout planning
Strengths
- Best-in-class HRV and recovery scoring
- Excellent sleep stage analysis
- Genuinely useful "Strain" metric for workout intensity
- No screen on the band — discreet and comfortable
Limitations
- No food logging or nutrition tracking at all
- Very expensive subscription plus hardware cost
- Primarily for serious athletes — overkill for most
- Pairs well with nibFIT; doesn't replace it
Strengths
- High production quality workout videos
- Excellent Apple Watch integration
- Great value if you're already in the Apple ecosystem
- Wide variety — HIIT, yoga, cycling, meditation
Limitations
- Requires Apple Watch for most features
- No food or nutrition tracking whatsoever
- No personalised workout plan — you pick from a library
- Not a replacement for a tracking app like nibFIT
The final word
If you're an iPhone user who wants to track food, get a workout plan, and receive daily AI coaching — nibFIT is the only app that does all three well. Everything else specialises in one piece of the puzzle.
Whoop and Fitbit are excellent wearable companions — use them alongside nibFIT if you're serious about recovery data. Apple Fitness+ is great for guided workouts, not tracking. Noom is psychology coaching, not an app.
The best fitness app is still the one you'll actually open tomorrow morning. nibFIT's camera logging makes that a 5-second habit instead of a 5-minute chore.