# Oral Arithmetic vs Develop good habits：DuDu Game

The clearest difference is in-app purchases: Oral Arithmetic at none against Develop good habits：DuDu Game's 2. Oral Arithmetic also leads on update cadence (every 7 months vs every 35 months) and iOS requirement (9.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Develop good habits：DuDu Game sells 2 in-app purchases, starting at $0.99 per month. Oral Arithmetic asks for nothing beyond the download.

Oral Arithmetic ships an update every 7 months, Develop good habits：DuDu Game every 35 months. The most recent releases landed on September 15, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Oral Arithmetic | Develop good habits：DuDu Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/develop-good-habitsdudu-game/id1670100735/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 35 months |
| Monetization | — | Freemium |
| Size | 50 MB | 79 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [猛 王](https://appshunter.io/developer/1052102545) | [有量网络科技(天津)有限公司](https://appshunter.io/developer/1765488158) |

## What reviewers say

### Oral Arithmetic

[App page](https://appshunter.io/ios/app/oral-arithmetic/id1526252439)

**Features:** macOS Compatibility

**In-app purchases:** none


### Develop good habits：DuDu Game

[App page](https://appshunter.io/ios/app/develop-good-habitsdudu-game/id1670100735)

This educational game helps children develop essential life habits through interactive play. It covers routines like bedtime, hygiene, safety, environmental care, and chores, making learning fun and engaging for young minds.

**Highlights:** Bedtime and wake-up routines, Hygiene and cleanliness, Traffic safety awareness, Environmental care, Family labor and chores, Autonomous ability development, Interactive gameplay

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $0.99 | per month |
| Annual subscription | $3.99 | per year |


## Frequently asked questions

### Is Oral Arithmetic free?

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

### Is Develop good habits：DuDu Game free?

Develop good habits：DuDu Game is free to download, with in-app purchases available.

### Do Oral Arithmetic or Develop good habits：DuDu Game have ads?

Neither Oral Arithmetic nor Develop good habits：DuDu Game shows ads.

### Which is updated more often, Oral Arithmetic or Develop good habits：DuDu Game?

Oral Arithmetic ships an update every 7 months, and Develop good habits：DuDu Game every 35 months. Most recently, Oral Arithmetic was updated on September 15, 2026 and Develop good habits：DuDu Game on September 19, 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.*