Tracking your weight is one of the most powerful tools in any fitness journey — but the scale on its own tells you very little. You need an app that logs your daily weight, filters out day-to-day fluctuations, and shows you the actual trend over time.
Here are the best weight tracker apps for Android in 2026.
Why Track Your Weight with an App?
Daily weight fluctuates massively. Your weight can swing by 1–3kg from day to day due to water retention, food in your digestive system, hormonal changes, and glycogen levels. Without tracking, these fluctuations look like progress stalling or regression — when in fact you may be losing fat consistently.
The trend is what matters. A good weight tracker app shows your rolling average over 7–14 days, which filters out day-to-day noise and reveals the actual trajectory. This is what you should base decisions on — not any individual weigh-in.
Logging creates accountability. Seeing your weight in a chart makes it concrete. Most people who track their weight are more consistent in their eating than those who don't.
1. NutriBalance — Best Integrated Weight + Calorie Tracker (Free)
Platform: Android Price: Free
NutriBalance integrates weight tracking directly with calorie and macro tracking — which is the most useful combination. When you log your weight and your food in the same app, you can see correlations between what you eat and how your weight responds.
Weight tracking features:
- Log your weight daily (kg, lbs, or stone)
- Progress charts showing your weight trend over time (week, month, all-time)
- Visual line chart with individual data points and trend line
- Works alongside your calorie diary — see weight and nutrition data in the same app
- No premium required — all weight tracking features are free
Why the integration matters:
If you're in a calorie deficit and your weight has been flat for 3 weeks, you can check your logged calorie data in the same app to investigate. Did you go over your calorie goal consistently? Are you logging accurately? The answer is in the same app — you don't need to cross-reference between two different tools.
Best for: Users who want to track both nutrition and weight in one free app.
2. Happy Scale — Best Dedicated Weight Trend App (iOS — Android alternative: Libra)
Platform: iOS (Happy Scale) / Android (Libra) Price: Free
Happy Scale (iOS) and Libra (Android) are dedicated weight trend apps — they do nothing but track your weight and show you the trend. No calorie tracking, no food diary. But they do the one thing better than almost anyone: their moving average and trend calculation is among the most sophisticated available in a free app.
Best for: Users who want a dedicated, data-rich weight tracker as a companion to a separate calorie tracking app.
3. Libra — Best Dedicated Weight Tracker for Android
Platform: Android Price: Free
Libra is the Android equivalent of Happy Scale — focused entirely on weight tracking with a good moving average algorithm. It shows exponential moving averages rather than simple averages, which weights recent measurements more heavily and is slightly more responsive to actual trend changes.
Best for: Android users who want a dedicated weight trend tracker as a complement to NutriBalance.
4. Google Fit — Basic Weight Logging
Platform: Android Price: Free (built-in)
Google Fit can log body weight and show a basic chart. The weight tracking feature is minimal — no trend analysis, no moving average — but it integrates with other Google health data and is pre-installed on many Android devices.
Best for: Users who want weight logging integrated with their Google health ecosystem without downloading additional apps.
How to Weigh Yourself for Accurate Tracking
Consistency beats accuracy. It doesn't matter as much what time you weigh yourself as long as it's the same time every day. The most common recommendation: first thing in the morning, after using the bathroom, before eating or drinking.
Why morning works: Morning weight minimises variables — you've fasted overnight, your digestive system is clear, and hydration is at its most consistent. This gives you the most reproducible measurement.
What to do with daily fluctuations:
- Expect 0.5–2kg swings between days — this is normal
- Focus on your 7-day average trend, not individual readings
- A week of higher weights followed by a drop ("whoosh effect") is common — the scale often stays flat then drops suddenly
- Trust the trend, not the number
Weigh-in frequency:
- Daily gives you the most data for trend analysis
- 3x per week is the minimum for meaningful trend data
- Once per week is too infrequent — one anomalous reading distorts the whole picture
Reading Your Weight Progress Chart
A good trend line over 4 weeks tells you:
- Downward slope: you're in a calorie deficit and losing fat (or weight) ✅
- Flat: you're at maintenance calories, or your deficit is being offset by other factors ⚠️
- Upward slope: you're in a calorie surplus ❌ (unless that's your goal)
What to do when weight stalls:
- First, check your logging accuracy — are you logging oils, condiments, and drinks?
- Audit for weekends — is your deficit being undone by Saturday/Sunday eating?
- Recalculate your TDEE — as you lose weight, your maintenance calories decrease
- Consider a 1–2 week diet break at maintenance before resuming the deficit
Frequently Asked Questions
What is the best free weight tracker app for Android? NutriBalance is the best free weight tracker that also includes calorie and macro tracking — keeping all your nutrition data in one place. For a dedicated weight-only tracker, Libra is a good free Android option.
Should I track my weight every day? Yes — daily weighing gives you the most data for trend analysis. The key is to focus on your 7-day average rather than individual readings. Daily fluctuations of 1–3kg are normal and expected.
Why does my weight fluctuate so much day to day? Day-to-day weight changes are primarily driven by water retention, food volume in your digestive system, glycogen stores (which bind water), and hormonal cycles. These fluctuations have nothing to do with fat loss or gain — fat changes slowly. Track your 7-day average trend, not daily readings.
How long until I see progress on a weight tracker? With a 500-calorie daily deficit, expect to see a downward trend after 2–3 weeks of consistent logging. Early on, the trend may be masked by water weight changes (especially if you've recently reduced carbohydrates). Give it 3 weeks before adjusting your approach.
Track your calories, macros, and streaks for free with NutriBalance — the gamified calorie tracker for Android.
