# Pulsoid vs 妙算21

The clearest difference is ads: Pulsoid at none against 妙算21's shown. Pulsoid also leads on monetization model (free vs ad-supported) and device support (4 vs 2). 妙算21's advantage is update cadence (weekly vs monthly). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Pulsoid ships an update monthly, 妙算21 weekly. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Pulsoid | 妙算21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/21/id6743411073/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 51.4% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Weekly** |
| Monetization | **Free** | Ad-supported |
| Size | 8 MB | 69 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anna Pedchenko](https://appshunter.io/developer/1609775039) | [抗抗 韩](https://appshunter.io/developer/1681688691) |

## What reviewers say

### Pulsoid

[App page](https://appshunter.io/ios/app/pulsoid/id1194772720)

This app connects to compatible heart rate monitors and Apple Watch to capture and transmit your heart rate data to a website. Manage your data and widgets through the online platform. Requires a compatible monitor and a Pulsoid account.

**Highlights:** Connects to heart rate monitors via BLE, Transmits data to Pulsoid website, Integrates with Apple Health, Manages widgets online, Supports Apple Watch

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 妙算21

[App page](https://appshunter.io/ios/app/21/id6743411073)

A simple and fun number addition elimination game. Enjoy endless entertainment with this addictive puzzle experience.

**Highlights:** Number addition, Elimination mechanics, Simple gameplay, Addictive puzzle, Casual entertainment

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pulsoid free?

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

### Is 妙算21 free?

妙算21 is free to download, with no in-app purchases.

### Do Pulsoid or 妙算21 have ads?

妙算21 shows ads; Pulsoid does not.

### Which is updated more often, Pulsoid or 妙算21?

Pulsoid ships an update monthly, and 妙算21 weekly. Most recently, Pulsoid was updated on October 10, 2026 and 妙算21 on October 3, 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.*