Comparison

BMI vs Simple BMI evaluator

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

Head to head
About

BMI

Calculate your Body Mass Index (BMI) and Ideal Body Weight. It also computes your Basal Metabolic Rate (BMR) and Total Energy Expenditure. Track your daily weight, water intake, and exercise to monitor progress.

Highlights
  • BMI calculation
  • Ideal Body Weight range
  • BMR and Total Energy Expenditure
  • Daily weight tracking
  • Water intake tracking
  • Exercise time tracking
  • US and Metric units support
Features
Read full description

Calculate your Body Mass Index (BMI) and Ideal Body Weight range based on the relevant information on body weight, height, age and sex. Calculate your Basel Metabolic Rate (BMR) and Total Energy Expenditure based on the relevant information on body weight, height, age, sex and activity level. Stay motivated by tracking your daily weight, water intake and exercise time to analyze your progress in a simplified way. Included features: * BMI calculation - classified by sex and different age ranges * BMI Classification Support * Ideal Body Weight Range * BMR calculation and Total Energy Expenditure * Local storage to track your daily weight * Track your water intake * Track your training time * Support both US and Metric Units * Built-in Reminder to record your weight, time of training... More information about the BMI is available on the website of the World Health Organization (WHO).

About

Simple BMI evaluator

Features
Read full description

Enter your weight and height to see your Body Mass Index. The result updates as you type. Designed to work with VoiceOver: every field and button has a spoken label, your BMI is read together with its WHO category, the healthy weight range is read as a full sentence, and weight changes made with the +/- buttons are announced. Supports Dynamic Type: text and the BMI scale follow the text size chosen in iOS settings. WHAT IT SHOWS • Classic BMI and Trefethen's revised BMI (Oxford, 2013), which fits very tall and very short people better • WHO category, from severe thinness to obesity class III • The weight range that counts as normal for your height • A color scale showing where your value falls ALSO • Kilograms and meters, or pounds and feet • +/- buttons to adjust your weight without retyping it • Share the result • iPhone and iPad, no account needed Formulas and tables come from official sources, listed in the app under References. This app gives information only. It is not a medical device and does not replace advice from a doctor.

Screenshots

BMI4 screens
Simple BMI evaluator4 screens

Verdict

The call

The clearest difference is in-app purchases: Simple BMI evaluator at none against BMI's 1. Simple BMI evaluator also leads on update cadence (every 3 months vs every 6 months). On price, ads, device support and iOS requirement 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. BMI sells 1 one-off in-app purchase. Simple BMI evaluator asks for nothing beyond the download.

UpkeepUpdate frequency

BMI ships an update every 6 months, Simple BMI evaluator every 3 months. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

Scorecard2 real differences · 8 level
BMI versus Simple BMI evaluator: the parameters behind the verdict, then further details
ParameterBMISimple BMI evaluator
PriceFreeFree
Rating4.6 (158 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings158 — better—
Update frequencyEvery 6 monthsEvery 3 months — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size10 MB30 MB
Age rating4+17+
DeveloperThang NguyenSonya Marcarelli

In-app purchases

1 purchases

BMI

One-time1
  • Pro Upgrade$4.99
None

Simple BMI evaluator

No in-app purchases

Questions

Is BMI free?
BMI is free to download, with in-app purchases available.
Is Simple BMI evaluator free?
Simple BMI evaluator is free to download, with no in-app purchases.
Do BMI or Simple BMI evaluator have ads?
Both BMI and Simple BMI evaluator show ads.
Which is updated more often, BMI or Simple BMI evaluator?
BMI ships an update every 6 months, and Simple BMI evaluator every 3 months. Most recently, BMI was updated on November 2, 2026 and Simple BMI evaluator on November 6, 2026.

Other comparisons