BMI Calculator vs Retainer Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BMI Calculator
Calculate and track your Body Mass Index (BMI) with this user-friendly app. It provides personalized health insights, ideal weight recommendations, and supports various units and classification systems. Monitor your weight journey and understand health risks.
- Instant BMI calculation with animated gauge
- Personalized health insights
- Ideal weight recommendations
- Metric and imperial unit support
- WHO and DGE classification systems
- Age and gender-specific calculations
- Offline functionality
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Calculate and track your Body Mass Index (BMI) with the most accurate and user-friendly BMI calculator app. KEY FEATURES: • Instant BMI calculation with animated visual gauge • Personalized health insights and ideal weight recommendations • Support for metric kg/cm, imperial lbs/ft, and British stones units • Choice of WHO or DGE German Nutrition Society classification systems • Age-specific calculations for children ages 7 and up, plus adults • Gender-specific BMI evaluation for accurate results • Color-coded BMI categories with real-time visual feedback • Clean, intuitive interface with instant calculations HEALTH BENEFITS: • Monitor your weight loss or weight gain journey • Understand health risks associated with your current BMI • Set realistic goals for achieving your ideal weight • Track progress toward a healthier lifestyle • Early detection of weight-related health concerns CLASSIFICATION SYSTEMS: Choose between two professional BMI classification systems: WHO - World Health Organization: - Underweight: BMI below 18.5 - Normal weight: BMI 18.5-24.9 - Overweight: BMI 25-29.9 - Obese: BMI 30 and above DGE - German Nutrition Society: - Gender-specific BMI ranges - Alternative classification for European standards ADVANCED FEATURES: • Visual BMI gauge with animated indicator • Supports ages 7 and up with child-specific growth charts • Settings persistence - remembers your preferences • Works offline - no internet connection required • Adults-only mode option available IMPORTANT NOTE: BMI is a screening tool that provides a general health indicator. It doesn't account for muscle mass, bone density, or body composition. Always consult healthcare professionals for personalized medical advice. Questions or feedback? Contact us at info@appovo.com
Retainer Timer
This app helps users remember to put in their dental retainers or clear aligners after eating. It provides notifications and tracks daily statistics for wear time, with cloud storage for seamless device switching.
- Wear time reminders
- Daily statistics
- Cloud data storage
- Device switching
- Progress tracking
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Do you have a product like Invisalign, a retainer or a clear aligner? Do you forget to put them back in after eating? Well, the solution is here! Retainer Timer will make sure you remember with notifications while also allowing you to view your statistics for previous days. During the day you can check your current grade for the day or look at the final grade for previous days. All of this data is stored in the cloud allowing you to switch devices freely and keep your progress and stats.
Screenshots
Verdict
The clearest difference is rating: BMI Calculator at 4.5 against Retainer Timer's 1.0. BMI Calculator also leads on ratings volume (30K vs 2). Retainer Timer's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 17.0). On price, update cadence, 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
Both are free to download. BMI Calculator sells 1 one-off in-app purchase. Retainer Timer asks for nothing beyond the download.
BMI Calculator holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: BMI Calculator has 30K ratings behind it against 2, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on November 8, 2026 and November 2, 2026 respectively.
| Parameter | BMI Calculator | Retainer Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (30K ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 47.2% of reviews | — |
| Number of ratings | 30K — better | 2 |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 42 MB |
| Age rating | 12+ | 4+ |
| Developer | Steffen Mayer | Lachlan Maxwell |
Bugs and requests
BMI Calculator
Reported bugs
2 issues- Classifies healthy weights as overweight
- Inconsistent results across devices
Requested features
3 requests- More accurate BMI calculations
- Customizable weight goals
- Consideration for muscle mass
Retainer Timer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
BMI Calculator
- Remove Ads$2.99
Retainer Timer
No in-app purchases
Questions
Is BMI Calculator free?
Is Retainer Timer free?
Which has better reviews, BMI Calculator or Retainer Timer?
Do BMI Calculator or Retainer Timer have ads?
Which is updated more often, BMI Calculator or Retainer Timer?
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