# 21DaysOfChange vs Love Hz

The clearest difference is ads: 21DaysOfChange at none against Love Hz's shown. Love Hz's advantage is update cadence (every 2 days vs every 9 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 21DaysOfChange sells 4 in-app purchases, starting at $5.99 per month and Love Hz sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

21DaysOfChange ships an update every 9 months, Love Hz every 2 days. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 21DaysOfChange | Love Hz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 2 days** |
| Size | 59 MB | 74 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Hong Son Vu](https://appshunter.io/developer/1767993431) | [HyeongSeok Oh](https://appshunter.io/developer/1474239115) |

## What reviewers say

### 21DaysOfChange

[App page](https://appshunter.io/ios/app/21daysofchange/id6677019535)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 21DaysOfChange Monthly Premium | $5.99 | per month |
| 21DaysOfChange Monthly Business | $17.99 | per month |
| 21DaysOfChange Yearly Premium | $71.99 | per year |
| 21DaysOfChange Yearly Business | $214.99 | per year |


### Love Hz

[App page](https://appshunter.io/ios/app/love-hz-attraction-frequency/id6782142860)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 프리미엄 1개월 이용권 | $1.99 | per month |
| 프리미엄 1년 이용권 | $17.99 | per year |


## Frequently asked questions

### Is 21DaysOfChange free?

21DaysOfChange is free to download, with in-app purchases available.

### Is Love Hz free?

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

### Do 21DaysOfChange or Love Hz have ads?

Love Hz shows ads; 21DaysOfChange does not.

### Which is updated more often, 21DaysOfChange or Love Hz?

21DaysOfChange ships an update every 9 months, and Love Hz every 2 days. Most recently, 21DaysOfChange was updated on October 5, 2026 and Love Hz on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*