# 三省 vs 英飞思想家

The clearest difference is in-app purchases: 英飞思想家 at none against 三省's 3. 英飞思想家 also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 三省 sells 3 in-app purchases, starting at $2.99 per month. 英飞思想家 asks for nothing beyond the download.

三省 ships an update every 6 months, 英飞思想家 every 8 months. The most recent releases landed on August 11, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | 三省 | 英飞思想家 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id6470999911/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 8 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [嘉达 黄](https://appshunter.io/developer/1708566399) | [Shenzhen Infi Unlimited Technology Co., Ltd.](https://appshunter.io/developer/1718506389) |

## What reviewers say

### 三省

[App page](https://appshunter.io/ios/app/id6470999911)

This cognitive tool uses cards for recording, reviewing, and self-dialogue to aid memory and clear thinking. It offers flexible input methods, knowledge networking, and visual mind mapping to enhance understanding and reflection.

**Highlights:** Card input (typing & handwriting), Bidirectional knowledge linking, Visual mind maps, Self-dialogue mechanism, Spaced repetition review, Cognitive graph building

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThreeTimes - Monthly Plan | $2.99 | per month |
| ThreeTimes - Yearly Plan | $4.99 | per year |
| ThreeTimes - Lifetime Plan | $9.99 | one-time |


### 英飞思想家

[App page](https://appshunter.io/ios/app/id6473156197)

**In-app purchases:** none


## Frequently asked questions

### Is 三省 free?

三省 is free to download, with in-app purchases available.

### Is 英飞思想家 free?

英飞思想家 is free to download, with no in-app purchases.

### Do 三省 or 英飞思想家 have ads?

Neither 三省 nor 英飞思想家 shows ads.

### Which is updated more often, 三省 or 英飞思想家?

三省 ships an update every 6 months, and 英飞思想家 every 8 months. Most recently, 三省 was updated on August 11, 2026 and 英飞思想家 on September 15, 2026.

---

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