# Hairo vs Constant Scale

The clearest difference is in-app purchases: Constant Scale at none against Hairo's 2. Constant Scale also leads on iOS requirement (11.0 vs 15.5). Hairo's advantage is update cadence (every 10 days vs every 4 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Hairo sells 2 in-app purchases, starting at $14.99 per month. Constant Scale asks for nothing beyond the download.

Hairo ships an update every 10 days, Constant Scale every 4 weeks. Both last shipped on September 30, 2026.

## The numbers

| Metric | Hairo | Constant Scale |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 4 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 160 MB | 150 MB |
| Requires iOS | 15.5 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [HairoLabs](https://appshunter.io/developer/1656626124) | [Yiwu Chaolan Import & Export Co., Ltd.](https://appshunter.io/developer/1788815884) |

## What reviewers say

### Hairo

[App page](https://appshunter.io/ios/app/hairo/id6446069241)

This app helps users combat hair loss and thinning. It offers tools to track hair growth, receive personalized advice, and learn about hair care treatments. Users can monitor progress and set goals for healthier, fuller hair.

**Highlights:** Hair growth tracking, Personalized recommendations, Educational articles, Scalp photo taking, Goal setting

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hairo Premium Monthly | $14.99 | per month |
| Hairo Premium Annual | $99.99 | per year |


### Constant Scale

[App page](https://appshunter.io/ios/app/constant-scale/id6740186656)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hairo free?

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

### Is Constant Scale free?

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

### Do Hairo or Constant Scale have ads?

Neither Hairo nor Constant Scale shows ads.

### Which is updated more often, Hairo or Constant Scale?

Hairo ships an update every 10 days, and Constant Scale every 4 weeks. Most recently, Hairo was updated on September 30, 2026 and Constant Scale on September 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.*