Comparison

OneCal Calorie Tracker vs Simple Weight & BMI Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OneCal Calorie Tracker

This app offers a straightforward approach to tracking daily calorie intake. It focuses on simplicity, allowing users to log their food and monitor their targets without complex calculations or features. The goal is to make calorie management quick and easy, freeing up users' time.

Highlights
  • Science-based calorie tracking
  • No macro calculations
  • No barcode scanning
  • Fast and simple logging
  • View calorie targets
  • Focus on calories in, calories out
Features
Read full description

OneCal is a science-based calorie tracker for people who don’t want to think about weight loss—they just want to do it. No macros to calculate, no barcode scanning, no friend feeds, no badges. Enter the calories that you eat, see your target, and move on. It’s calories in, calories out—fast to log, simple to follow—so you can spend less time in an app and more time living your life. This app provides general information only and is not medical advice. Consult a qualified healthcare professional before making changes to your diet or exercise. OneCal does not diagnose, treat, cure, or prevent any condition and disclaims liability for decisions made based on app data.

About

Simple Weight & BMI Tracker

Features
Read full description

Simple Weight Tracker — BMI & Health Take control of your health journey with the most comprehensive yet easy-to-use weight and body metrics tracker available. Whether you're losing weight, building muscle, or just staying on top of your health, Simple Weight Tracker gives you everything you need — in one beautifully designed app. WEIGHT TRACKING • Log daily weight with notes and progress photos • Set a goal weight and track your progress • View beautiful charts across 7 days, 1 month, 3 months, 6 months, 1 year, 2 years, or all time • Weekly average and trend analysis ADVANCED HEALTH INDICES • BMI — Ethnicity-adjusted thresholds following WHO & NHS guidelines • WHtR (Waist-to-Height Ratio) — Abdominal fat risk indicator • WHR (Waist-to-Hip Ratio) — Cardiovascular risk by sex • BRI (Body Roundness Index) — Modern, more accurate body shape indicator • Historical charts for every index so you can see progress over time BODY COMPOSITION • Log fat %, lean mass, muscle mass, bone mineral content, visceral fat • Regional breakdown: arms, legs, trunk • Bone health: T-score, Z-score, osteopenia risk flag • Body measurements: waist, hip, belly, chest INSIGHTS & TRENDS • Visual weight progress charts with smart aggregation • Health indicator history with colour-coded status • Body composition trends over time • Personalized status alerts and category classifications APPLE HEALTH SYNC • Automatically sync weight, BMI, and body fat with Apple Health • Read height from Apple Health for instant BMI calculation PRIVACY & SECURITY • PIN lock to protect your data • All data stored locally on your device • No account required — no data sent to servers DATA MANAGEMENT • Export and import your data • Share entries and reports 10 LANGUAGES SUPPORTED English, Spanish, Arabic, Bengali, German, French, Hindi, Japanese, Portuguese, Russian, Chinese PERSONALISED FOR YOU • Supports kg/lbs and cm/inches • Ethnicity-aware BMI calculations (South Asian, East Asian, Middle Eastern, Black African, White) • Sex-specific health thresholds • Age-aware profile setup PREMIUM Upgrade to remove ads and unlock full access to all features for an uninterrupted experience. Simple Weight Tracker is designed for informational purposes only and is not a substitute for professional medical advice. Always consult your healthcare provider for medical guidance.

Screenshots

OneCal Calorie Tracker3 screens
Simple Weight & BMI Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: OneCal Calorie Tracker at none against Simple Weight & BMI Tracker's 1. Simple Weight & BMI Tracker's advantage is update cadence (every 4 days vs every 9 days) and iOS requirement (14.0 vs 18.6). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple Weight & BMI Tracker sells 1 one-off in-app purchase. OneCal Calorie Tracker asks for nothing beyond the download.

UpkeepUpdate frequency

OneCal Calorie Tracker ships an update every 9 days, Simple Weight & BMI Tracker every 4 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 6 level
OneCal Calorie Tracker versus Simple Weight & BMI Tracker: the parameters behind the verdict, then further details
ParameterOneCal Calorie TrackerSimple Weight & BMI Tracker
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 9 daysEvery 4 days — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.614.0 — better
Further details — not scored
Size5 MB40 MB
Age rating4+4+
DeveloperMarcus SpitzmillerSimple Works LLC

In-app purchases

None

OneCal Calorie Tracker

No in-app purchases

1 purchases

Simple Weight & BMI Tracker

One-time1
  • Remove All Ads$8.99

Questions

Is OneCal Calorie Tracker free?
OneCal Calorie Tracker is free to download, with no in-app purchases.
Is Simple Weight & BMI Tracker free?
Simple Weight & BMI Tracker is free to download, with in-app purchases available.
Do OneCal Calorie Tracker or Simple Weight & BMI Tracker have ads?
Both OneCal Calorie Tracker and Simple Weight & BMI Tracker show ads.
Which is updated more often, OneCal Calorie Tracker or Simple Weight & BMI Tracker?
OneCal Calorie Tracker ships an update every 9 days, and Simple Weight & BMI Tracker every 4 days. Most recently, OneCal Calorie Tracker was updated on October 28, 2026 and Simple Weight & BMI Tracker on October 24, 2026.

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