Comparison

BMI Calculator vs Open Me First

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

Head to head
About

BMI Calculator

Quickly calculate your Body Mass Index (BMI) using your height and weight. Save your history locally or sync with the Health app for easy tracking. Ideal for fitness and health management with a clear, user-friendly interface.

Highlights
  • Instant BMI calculation
  • Save calculation history
  • Health app integration
  • Supports imperial and metric units
  • Clear user interface
Features
Read full description

Calculate your body mass index (BMI) in seconds. This simple BMI app focuses on the essentials: enter your height and weight, calculate, and instantly display the results. Save your calculations locally or in the Health app to keep track of your BMI history at any time. The clear user interface makes the app ideal for anyone who wants to calculate their BMI easily and without unnecessary features. Perfect for fitness, health, weight management, or to support a healthy lifestyle – fast, accurate, and easy to understand. Supports both imperial and metric units.

About

Open Me First

Features
Read full description

Feeling tempted by an urge to do something? Just need a little bit of space to get control back? Open Me First instead. Open Me First is a tiny pause button for you. When you feel the urge to do something that you don’t really want to do, tap this app first. Every urge or feeling can pass if you let it. Sometimes it’s hard to find the space to pause and breathe. This app gently guides you through a short breathing moment and a few calm, supportive messages. It reminds you that urges pass, feelings change, and you don’t have to act on every impulse. It stays with you until you feel strong enough to carry on. How it works • Open the app when you feel an urge to do something you don’t really want to do, or when you feel stuck in a thought loop. • Follow the simple on-screen breathing prompt. • Read a short, supportive message chosen for you. • Repeat the breathing and messages as many times as you like, and finish the session when you feel ready to move on. There are no accounts, no tracking, and no data collection. Everything happens on your device. The core experience is completely free. There is a one-time option to support the developer inside the app, but no pressure to do so. Why use it? • To stop yourself before you do something you don’t want to. • To create a tiny gap between feeling stressed and reacting. • To build a habit of pausing before you act. Open Me First is designed to be quiet, gentle, and completely private. It won’t judge you, it won’t nag you, and it won’t send notifications. It’s just a small space to breathe, think, and choose what you really want to do next.

Screenshots

BMI Calculator3 screens
Open Me First4 screens

Verdict

The call

The clearest difference is in-app purchases: BMI Calculator at none against Open Me First's 10. BMI Calculator also leads on iOS requirement (12.0 vs 15.1). Open Me First's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 23 months). On price 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. Open Me First sells 10 one-off in-app purchases. BMI Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

BMI Calculator ships an update every 23 months, Open Me First every 2 weeks. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
BMI Calculator versus Open Me First: the parameters behind the verdict, then further details
ParameterBMI CalculatorOpen Me First
PriceFreeFree
Rating4.6 (53 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings53 — better—
Update frequencyEvery 23 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size15 MB33 MB
Age rating12+4+
DeveloperLukas LubbeSteven Askew

In-app purchases

None

BMI Calculator

No in-app purchases

10 purchases

Open Me First

One-time10
  • Support the Developer$0.99
  • Support the Developer$1.99
  • Support the Developer$2.99
Show 7 more
  • Support the Developer$4.99
  • Support the Developer$5.99
  • Support the Developer$7.99
  • Support the Developer$9.99
  • Support the Developer$12.99
  • Support the Developer$14.99
  • Support the Developer$19.99

Questions

Is BMI Calculator free?
BMI Calculator is free to download, with no in-app purchases.
Is Open Me First free?
Open Me First is free to download, with in-app purchases available.
Do BMI Calculator or Open Me First have ads?
BMI Calculator shows ads; Open Me First does not.
Which is updated more often, BMI Calculator or Open Me First?
BMI Calculator ships an update every 23 months, and Open Me First every 2 weeks. Most recently, BMI Calculator was updated on October 29, 2026 and Open Me First on October 25, 2026.

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