Heightometer vs Flexx
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Heightometer
This application uses scientific and mathematical calculations based on a child's growth rate to predict their approximate future height. It provides future height estimates in both inches and centimeters for children aged 8 to 18.
- Future height prediction
- Growth rate analysis
- Scientific calculations
- Mathematical formulas
- Height in inches and centimeters
- Child age range 8-18
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It is an app to measure future height of children(between 8 years to 18 years) by their growth rate with scientific and mathematical calculation.This app tells the approx. future height of the child. You can see the future height in both inches and centimeters.
Flexx
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Flexx is built for one purpose: to help you become stronger, more disciplined, and more consistent in your training. It removes the clutter and complexity of traditional fitness apps, giving you a simple way to log your workouts and focus on steady progress. With Flexx, tracking your sets, reps, and weights is fast and effortless. Every workout is saved in your history, allowing you to see exactly how far you’ve come and where you need to push harder. Over time, these small improvements add up, turning discipline into results you can see and feel. Unlike apps that overwhelm you with features you do not need, Flexx is designed to stay out of your way. It is minimal, clean, and built to support your training, not distract you from it. Whether you are just starting your fitness journey or pushing toward new personal records, Flexx gives you a clear path forward. If you want a workout tracker that keeps things simple, helps you stay consistent, and shows your progress without the noise, Flexx is the tool for you. Important Info: Flexx is a paid app with auto-renewing subscriptions. To access the app's core functionalities you need to have an active subscription. Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/ascendprivacypolicy/home
Screenshots
Verdict
The clearest difference is price: Flexx at Free against Heightometer's $0.99. Heightometer's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 15.6). On 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
Flexx is free to download; Heightometer costs $0.99 up front. Flexx sells 2 in-app purchases, starting at $9.99 per month. Heightometer asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.
| Parameter | Heightometer | Flexx |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 days | Every 2 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 43 MB | 79 MB |
| Age rating | 4+ | 4+ |
| Developer | Kartik Khatana | Ankit Priyadarshi |
In-app purchases
Heightometer
No in-app purchases
Flexx
- Monthly Subscription$9.991 Month
- Yearly Subscription3 Days trial$29.991 Year
