# GrowMaxx vs Klū

The clearest difference is ads: Klū at none against GrowMaxx's shown. GrowMaxx's advantage is update cadence (every 3 days vs every 6 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. GrowMaxx sells 5 in-app purchases, starting at $4.99 per 7 days and Klū sells 2 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.

GrowMaxx ships an update every 3 days, Klū every 6 weeks. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | GrowMaxx | Klū |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (71 ratings)](https://appshunter.io/ios/app/growmaxx-height-predictor/id6753605862/reviews)** | — |
| Number of ratings | **71** | — |
| Positive reviews | 93.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 55 MB | 36 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [erdem sengun](https://appshunter.io/developer/1875764238) | [Karolina Kalyniuk](https://appshunter.io/developer/6772316537) |

## What reviewers say

### 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 |


### Klū

[App page](https://appshunter.io/ios/app/klu-decision-journal/id6772316535)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Klū Pro Monthly | $11.99 | per month |
| Klū Pro Quarterly | $29.99 | per 3 months |


## Frequently asked questions

### Is GrowMaxx free?

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

### Is Klū free?

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

### Do GrowMaxx or Klū have ads?

GrowMaxx shows ads; Klū does not.

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

GrowMaxx ships an update every 3 days, and Klū every 6 weeks. Most recently, GrowMaxx was updated on October 20, 2026 and Klū on October 13, 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.*