# Height Predictor vs Sumki

Height Predictor and Sumki are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Height Predictor sells 3 in-app purchases, starting at $2.99 per 7 days and Sumki sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Height Predictor ships an update every 3 days, Sumki every 2 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Height Predictor | Sumki |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Monetization | — | Subscription |
| Size | 38 MB | 81 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Han Kim](https://appshunter.io/developer/1505146544) | [Remaster Archive](https://appshunter.io/developer/6803796189) |

## What reviewers say

### Height Predictor

[App page](https://appshunter.io/ios/app/height-predictor-growth-chart/id6801840705)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Yearly | $19.99 | per year |
| Heightcast Pro | $4.99 | one-time |


### Sumki

[App page](https://appshunter.io/ios/app/sumki-height-and-habit-tracker/id6803796187)

This app offers personalized growth potential estimates and tracks habits like sleep, nutrition, and posture. It provides routines and insights to help users visualize their progress. Designed for motivational purposes, it encourages healthy lifestyle choices.

**Highlights:** Personalized growth potential estimate, Habit tracking (sleep, nutrition, posture), Personalized routines, Progress insights, Visual progress tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $5.99 | per 7 days |
| Monthly Plan | $19.99 | per month |
| Yearly Plan | $34.99 | per year |


## Frequently asked questions

### Is Height Predictor free?

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

### Is Sumki free?

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

### Do Height Predictor or Sumki have ads?

Neither Height Predictor nor Sumki shows ads.

### Which is updated more often, Height Predictor or Sumki?

Height Predictor ships an update every 3 days, and Sumki every 2 days. Most recently, Height Predictor was updated on October 29, 2026 and Sumki on October 31, 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.*