# Standly vs GrowMaxx

Standly and GrowMaxx both sit at 4.6 stars, but that hides the real split: 94% of GrowMaxx's written reviews are positive against 29% of Standly's. GrowMaxx also leads on update cadence (every 3 days vs every 3 weeks). Standly's advantage is ads (none vs shown). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Standly sells 4 in-app purchases, starting at $4.99 per 7 days and GrowMaxx sells 5 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

GrowMaxx holds the better App Store score, 4.7 against 4.6. Both are backed by a comparable volume of ratings — 117 and 71 respectively. Written reviews point the same way: 29% of Standly's written reviews are positive against 94% of GrowMaxx's.

Standly ships an update every 3 weeks, GrowMaxx every 3 days. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Standly | GrowMaxx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (117 ratings)](https://appshunter.io/ios/app/standly-predict-your-height/id6752656070/reviews) | **[4.7 (71 ratings)](https://appshunter.io/ios/app/growmaxx-height-predictor/id6753605862/reviews)** |
| Number of ratings | **117** | 71 |
| Positive reviews | 28.6% of reviews | **93.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 102 MB | 55 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Buy Beaver Technologies](https://appshunter.io/developer/1802270930) | [erdem sengun](https://appshunter.io/developer/1875764238) |

## What reviewers say

### Standly

[App page](https://appshunter.io/ios/app/standly-predict-your-height/id6752656070)

This app provides a personalized height prediction and growth tracking experience. It analyzes lifestyle factors like genetics, posture, nutrition, and sleep to offer a dynamic estimate of potential height and a tailored daily routine to support natural growth.

**Highlights:** Dynamic height prediction model, Personalized daily routine for posture, Lifestyle guidance for sleep and nutrition, Ongoing progress tracking, Growth habit optimization

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standly Weekly | $4.99 | per 7 days |
| Standly Premium | $24.99 | per year |
| Standly Yearly | $24.99 | per year |
| Standly Lifetime | $39.99 | one-time |


### GrowMaxx

[App page](https://appshunter.io/ios/app/growmaxx-height-predictor/id6753605862)

This AI-powered application helps users discover their growth potential through personalized routines, posture improvement exercises, and smart reminders. It offers daily plans to stretch smarter and track progress, aiming to enhance physical alignment and fitness.

**Highlights:** Height prediction with AI insights, Personalized daily stretch and workout routines, Progress tracking and regular updates, Posture improvement exercises, Smart reminders for consistency

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week Height Increase | $4.99 | per 7 days |
| 1 Week Height Increase | $7.49 | per 7 days |
| 1 Year Height Boost - Offer | $24.99 | per year |
| 52 Week Height Increase | $59.99 | per year |
| 52 Week Height Increase | $59.99 | per year |


## Frequently asked questions

### Is Standly free?

Standly is free to download, with in-app purchases available.

### Is GrowMaxx free?

GrowMaxx is free to download, with in-app purchases available.

### Which has better reviews, Standly or GrowMaxx?

GrowMaxx is rated higher. Standly averages 4.6 out of 5 from 117 ratings, while GrowMaxx averages 4.7 from 71 ratings.

### Do Standly or GrowMaxx have ads?

GrowMaxx shows ads; Standly does not.

### Which is updated more often, Standly or GrowMaxx?

Standly ships an update every 3 weeks, and GrowMaxx every 3 days. Most recently, Standly was updated on November 8, 2026 and GrowMaxx on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*