# Height Comparison vs NightKeep

The clearest difference is in-app purchases: NightKeep at none against Height Comparison's 4. NightKeep also leads on update cadence (every 2 days vs every 2 weeks). Height Comparison's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Height Comparison sells 4 in-app purchases, starting at $1.99 per month. NightKeep asks for nothing beyond the download.

Height Comparison ships an update every 2 weeks, NightKeep every 2 days. The most recent releases landed on October 6, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Height Comparison | NightKeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/height-comparison-size-tool/id6547852893/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 21 MB | 8 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Amina Asad](https://appshunter.io/developer/1612072232) | [Aviv Nahon](https://appshunter.io/developer/1643978978) |

## What reviewers say

### Height Comparison

[App page](https://appshunter.io/ios/app/height-comparison-size-tool/id6547852893)

Easily compare your height to friends and family with this intuitive tool. It offers accurate measurements in both centimeters and inches, with added features like BMI calculation and couple measurements.

**Highlights:** Accurate height comparisons, Measurements in cm and inches, User-friendly interface, BMI calculations, Couple measurements, Family measures

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month | $1.99 | per month |
| Three Month | $4.99 | per 3 months |
| One Year | $9.99 | per year |
| Life time - One time | $14.99 | one-time |


### NightKeep

[App page](https://appshunter.io/ios/app/nightkeep-thoughts-keeper/id6765671990)

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

**In-app purchases:** none


## Frequently asked questions

### Is Height Comparison free?

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

### Is NightKeep free?

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

### Do Height Comparison or NightKeep have ads?

Neither Height Comparison nor NightKeep shows ads.

### Which is updated more often, Height Comparison or NightKeep?

Height Comparison ships an update every 2 weeks, and NightKeep every 2 days. Most recently, Height Comparison was updated on October 6, 2026 and NightKeep on September 29, 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.*