# HiWord.AI vs Plain850：核心英文 850詞

The clearest difference is in-app purchases: Plain850：核心英文 850詞 at none against HiWord.AI's 1. Plain850：核心英文 850詞 also leads on iOS requirement (13.0 vs 18.0). HiWord.AI's advantage is update cadence (daily vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. HiWord.AI sells 1 in-app purchase, starting at $39.99 per year. Plain850：核心英文 850詞 asks for nothing beyond the download.

HiWord.AI ships an update daily, Plain850：核心英文 850詞 every 2 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HiWord.AI | Plain850：核心英文 850詞 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 weeks |
| Size | 65 MB | 43 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vinehoo.com](https://appshunter.io/developer/537090737) | [Lok Wai](https://appshunter.io/developer/1895320924) |

## What reviewers say

### HiWord.AI

[App page](https://appshunter.io/ios/app/hiwordai/id6769323075)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HiWord.AI Pro | $39.99 | per year |


### Plain850：核心英文 850詞

[App page](https://appshunter.io/ios/app/plain850-850/id6776902920)

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

**In-app purchases:** none


## Frequently asked questions

### Is HiWord.AI free?

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

### Is Plain850：核心英文 850詞 free?

Plain850：核心英文 850詞 is free to download, with no in-app purchases.

### Do HiWord.AI or Plain850：核心英文 850詞 have ads?

Neither HiWord.AI nor Plain850：核心英文 850詞 shows ads.

### Which is updated more often, HiWord.AI or Plain850：核心英文 850詞?

HiWord.AI ships an update daily, and Plain850：核心英文 850詞 every 2 weeks. Most recently, HiWord.AI was updated on November 9, 2026 and Plain850：核心英文 850詞 on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*