# Popi ! vs 53Hz

The clearest difference is in-app purchases: Popi ! at none against 53Hz's 4. Popi ! also leads on iOS requirement (15.0 vs 17.0). 53Hz's advantage is update cadence (every 2 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. 53Hz sells 4 in-app purchases, starting at $1.99 per month. Popi ! asks for nothing beyond the download.

Popi ! ships an update every 3 months, 53Hz every 2 days. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Popi ! | 53Hz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/53hz/id6756495021/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 70 MB | 198 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Cyrille Varin](https://appshunter.io/developer/1797930174) | [Haoqiang Chai](https://appshunter.io/developer/1163486933) |

## What reviewers say

### Popi !

[App page](https://appshunter.io/ios/app/popi/id6749168575)

**Features:** macOS Compatibility

**In-app purchases:** none


### 53Hz

[App page](https://appshunter.io/ios/app/53hz/id6756495021)

Express your current thoughts and connect with others through algorithmically matched anonymous content. Unlock identities and start conversations only after mutual interest is shown, prioritizing genuine expression over popularity metrics.

**Highlights:** Publish dynamic thoughts, Content-based matching, Receive 6 matched recommendations, Anonymous browsing, Unlock identity upon mutual interest, Private chat space

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO 包月续费 | $1.99 | per month |
| 加油包 | $0.99 | one-time |
| PRO 月费 | $2.99 | one-time |
| PRO 年包 | $6.99 | one-time |


## Frequently asked questions

### Is Popi ! free?

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

### Is 53Hz free?

53Hz is free to download, with in-app purchases available.

### Do Popi ! or 53Hz have ads?

Neither Popi ! nor 53Hz shows ads.

### Which is updated more often, Popi ! or 53Hz?

Popi ! ships an update every 3 months, and 53Hz every 2 days. Most recently, Popi ! was updated on October 8, 2026 and 53Hz on October 20, 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.*