# Delta单词 vs Infinitest

The clearest difference is in-app purchases: Delta单词 at none against Infinitest's 3. Delta单词 also leads on iOS requirement (15.1 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Infinitest sells 3 in-app purchases, starting at $0.99 per month. Delta单词 asks for nothing beyond the download.

Delta单词 ships an update daily, Infinitest every 2 days. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Delta单词 | Infinitest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 days |
| Size | 180 MB | 12 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [田丰 何](https://appshunter.io/developer/1674464316) | [玉庭 何](https://appshunter.io/developer/1867438392) |

## What reviewers say

### Delta单词

[App page](https://appshunter.io/ios/app/delta/id6744654342)

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

**In-app purchases:** none


### Infinitest

[App page](https://appshunter.io/ios/app/infinitest/id6773301758)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度订阅 | $0.99 | per month |
| 年订阅 | $3.99 | per year |
| 终身会员 | $12.99 | one-time |


## Frequently asked questions

### Is Delta单词 free?

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

### Is Infinitest free?

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

### Do Delta单词 or Infinitest have ads?

Neither Delta单词 nor Infinitest shows ads.

### Which is updated more often, Delta单词 or Infinitest?

Delta单词 ships an update daily, and Infinitest every 2 days. Most recently, Delta单词 was updated on September 8, 2026 and Infinitest on September 9, 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.*