# HeightGPT vs Tallify

The clearest difference is in-app purchases: Tallify at none against HeightGPT's 2. Tallify also leads on update cadence (daily vs weekly). HeightGPT's advantage is iOS requirement (15.1 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. HeightGPT sells 2 in-app purchases, starting at $3.99 per 7 days. Tallify asks for nothing beyond the download.

HeightGPT ships an update weekly, Tallify daily. The most recent releases landed on June 1, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | HeightGPT | Tallify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (14 ratings)](https://appshunter.io/ios/app/heightgpt/id6741367617/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 27 MB |
| Requires iOS | **15.1** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Boulevard Legacy LLC](https://appshunter.io/developer/1788132576) | [Shouryajeet Walia](https://appshunter.io/developer/1886046206) |

## What reviewers say

### HeightGPT

[App page](https://appshunter.io/ios/app/heightgpt/id6741367617)

This AI-powered app helps you track and optimize your height growth. It offers personalized training, habit optimization, and predictive analytics based on various factors like genetics and lifestyle. Visualize your progress and achieve your growth potential.

**Highlights:** AI-powered height predictions, Growth visualizations, Personalized training plans, Growth habit optimization, Parental and genetics analysis, Smart to-do list for growth

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| One Time | $29.99 | one-time |


### Tallify

[App page](https://appshunter.io/ios/app/tallify-maximize-your-height/id6760743704)

**In-app purchases:** none


## Frequently asked questions

### Is HeightGPT free?

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

### Is Tallify free?

Tallify is free to download, with no in-app purchases.

### Do HeightGPT or Tallify have ads?

Neither HeightGPT nor Tallify shows ads.

### Which is updated more often, HeightGPT or Tallify?

HeightGPT ships an update weekly, and Tallify daily. Most recently, HeightGPT was updated on June 1, 2026 and Tallify on September 11, 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.*