Static BMR Numbers Go Stale
BMR scales with body mass. A user losing 10kg over 12 weeks sees BMR drop roughly 150 kcal/day. Apps that compute BMR once at onboarding and never update it leave their deficit math 5–10% wrong by the time the user has actually lost weight.
The fix is automatic recalculation on every weight entry.
How We Evaluated
- BMR equation options
- Automatic recalculation
- Free-tier completeness
- Integration with TDEE and deficit math
BMR Calculator App Comparison
| Feature | Nutrola | MacroFactor | Cronometer | MyFitnessPal | Lose It! | Yazio |
|---|---|---|---|---|---|---|
| BMR calc free | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ⚠️ PRO |
| Katch-McArdle | ✅ Yes | ✅ Yes | ✅ Yes | ⚠️ Premium | ⚠️ Premium | ⚠️ PRO |
| Auto-recalculation | ✅ Free | ✅ Yes | ⚠️ Gold | ⚠️ Premium | ⚠️ Premium | ⚠️ PRO |
| Trend integration | ✅ Free | ✅ Yes | ⚠️ Gold | ⚠️ Premium | ⚠️ Premium | ⚠️ PRO |
#1 Overall: Nutrola
Best free-tier BMR with auto-recalculation.
Why Nutrola wins:
- Multiple BMR equations free
- Auto-recalculation on weight entry
- Trend-based TDEE integration
Best for: Anyone wanting BMR numbers that stay current.
#2: MacroFactor
Algorithmic adjustment.
Best for: Long-term users. Limitation: Subscription.
#3: Cronometer
Solid free BMR; auto-update Gold.
Best for: Detail-first users. Limitation: Auto-recalculation Premium.
#4: MyFitnessPal
Free static; updates Premium.
Best for: Premium users. Limitation: Static BMR drifts on free tier.
#5: Lose It!
Similar to MFP.
Best for: Premium users. Limitation: Auto-update Premium.
#6: Yazio
PRO-only.
Best for: PRO users. Limitation: Free tier insufficient.
Frequently Asked Questions
What is the best BMR calculator app in 2026?
Nutrola for auto-updating; MacroFactor for paid algorithmic.
What is BMR and how is it different from TDEE?
BMR is rest calories; TDEE is BMR plus activity.
Which BMR equation is most accurate?
Katch-McArdle (with body fat); Mifflin-St Jeor general-purpose.
Should BMR change as I lose weight?
Yes — recalculate continuously.
How often should BMR be recalculated?
Every weight entry, ideally.