# 腕阅读 vs B³ Calculator

The clearest difference is update cadence: 腕阅读 at monthly against B³ Calculator's every 40 months. 腕阅读 also leads on iOS requirement (15.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

腕阅读 costs $0.99 and B³ Calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

腕阅读 ships an update monthly, B³ Calculator every 40 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 腕阅读 | B³ Calculator |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Positive reviews | 46.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 40 months |
| Size | 19 MB | 2 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [凯 程](https://appshunter.io/developer/1232505614) | [玉美 张](https://appshunter.io/developer/1550410737) |

## What reviewers say

### 腕阅读

[App page](https://appshunter.io/ios/app/id6444592337)

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

**In-app purchases:** none


### B³ Calculator

[App page](https://appshunter.io/ios/app/b-calculator/id6450912372)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is 腕阅读 free?

腕阅读 costs $0.99, with no in-app purchases.

### Is B³ Calculator free?

B³ Calculator costs $0.99, with no in-app purchases.

### Do 腕阅读 or B³ Calculator have ads?

Neither 腕阅读 nor B³ Calculator shows ads.

### Which is updated more often, 腕阅读 or B³ Calculator?

腕阅读 ships an update monthly, and B³ Calculator every 40 months. Most recently, 腕阅读 was updated on November 7, 2026 and B³ Calculator on November 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.*