# 明白计算器 vs Sub3

The clearest difference is update cadence: 明白计算器 at daily against Sub3's every 9 days. 明白计算器 also leads on iOS requirement (12.0 vs 18). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 明白计算器 sells 1 one-off in-app purchase and Sub3 sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

明白计算器 ships an update daily, Sub3 every 9 days. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 明白计算器 | Sub3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6747792742/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 9 days |
| Size | 29 MB | 33 MB |
| Requires iOS | **12.0** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [娜 李](https://appshunter.io/developer/1788016304) | [辉 彭](https://appshunter.io/developer/1780252118) |

## What reviewers say

### 明白计算器

[App page](https://appshunter.io/ios/app/id6747792742)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 永久买断 | $0.99 | one-time |


### Sub3

[App page](https://appshunter.io/ios/app/sub3-subscription-tracker/id6761181626)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthly | $2.99 | per month |
| yearly | $12.99 | per year |
| lifetime | $19.99 | one-time |


## Frequently asked questions

### Is 明白计算器 free?

明白计算器 is free to download, with in-app purchases available.

### Is Sub3 free?

Sub3 is free to download, with in-app purchases available.

### Do 明白计算器 or Sub3 have ads?

Neither 明白计算器 nor Sub3 shows ads.

### Which is updated more often, 明白计算器 or Sub3?

明白计算器 ships an update daily, and Sub3 every 9 days. Most recently, 明白计算器 was updated on November 5, 2026 and Sub3 on October 28, 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.*