# Ai智学 vs 词骨英语850

The clearest difference is update cadence: 词骨英语850 at fortnightly against Ai智学's every 2 months. Ai智学's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

Ai智学 ships an update every 2 months, 词骨英语850 fortnightly. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Ai智学 | 词骨英语850 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 495 MB | 23 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [冕 李](https://appshunter.io/developer/1314239006) | [Bo Li](https://appshunter.io/developer/1894150079) |

## What reviewers say

### Ai智学

[App page](https://appshunter.io/ios/app/ai/id1316844099)

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

**In-app purchases:** none


### 词骨英语850

[App page](https://appshunter.io/ios/app/850/id6773175114)

A lightweight tool for mastering the 850 core words of Ogden Basic English. It helps you identify known words, focus on learning new ones, and provides comprehensive vocabulary support including definitions, examples, and pronunciation.

**Highlights:** Self-testing to remove known words, View learned, removed, and all vocabulary, Browse 850 core words by Ogden categories, Includes definitions, example sentences, and notes, US and UK pronunciation for words, UK for sentences, Flashcard mode with audio playback, Progress tracking for learned and removed words

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

**In-app purchases:** none


## Frequently asked questions

### Is Ai智学 free?

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

### Is 词骨英语850 free?

词骨英语850 is free to download, with no in-app purchases.

### Do Ai智学 or 词骨英语850 have ads?

Neither Ai智学 nor 词骨英语850 shows ads.

### Which is updated more often, Ai智学 or 词骨英语850?

Ai智学 ships an update every 2 months, and 词骨英语850 fortnightly. Most recently, Ai智学 was updated on October 2, 2026 and 词骨英语850 on October 6, 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.*