# AI背书匠 vs D2M eFly

The clearest difference is in-app purchases: D2M eFly at none against AI背书匠's 7. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. AI背书匠 sells 7 in-app purchases, starting at $5.99 per month. D2M eFly asks for nothing beyond the download.

AI背书匠 ships an update weekly, D2M eFly every 11 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | AI背书匠 | D2M eFly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (16 ratings)](https://appshunter.io/ios/app/ai/id6751886569/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 54.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 11 days |
| Monetization | Freemium | — |
| Size | 103 MB | 154 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Pixentia Limited](https://appshunter.io/developer/1889428925) | [鸿 朱](https://appshunter.io/developer/1896768340) |

## What reviewers say

### AI背书匠

[App page](https://appshunter.io/ios/app/ai/id6751886569)

This AI-powered tool enhances memory retention and learning efficiency through multi-sensory techniques and intelligent review systems. It helps users create structured knowledge frameworks and practice recall with features like AI-generated fill-in-the-blanks and supervised recitation.

**Highlights:** AI-powered content segmentation, AI-generated summaries and fill-in-the-blanks, Supervised recitation with error tracking, Intelligent question generation, Multi-sensory learning modes (audio, visual), Closed-loop learning process

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 背书匠月度会员 | $5.99 | per month |
| 背书匠月度会员 享用月度会员权益 | $6.99 | per month |
| 背书匠季度会员 | $6.99 | per 3 months |
| 背书匠季度会员 享用季度会员权益 | $19.99 | per 3 months |
| 充值获得VIP资格，永久，一折 | $6.99 | one-time |
| 背书匠永久会员 | $6.99 | one-time |
| 背书匠终身会员 永久享用会员权益 | $12.99 | one-time |


### D2M eFly

[App page](https://appshunter.io/ios/app/d2m-efly/id6777665785)

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

**In-app purchases:** none


## Frequently asked questions

### Is AI背书匠 free?

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

### Is D2M eFly free?

D2M eFly is free to download, with no in-app purchases.

### Do AI背书匠 or D2M eFly have ads?

Neither AI背书匠 nor D2M eFly shows ads.

### Which is updated more often, AI背书匠 or D2M eFly?

AI背书匠 ships an update weekly, and D2M eFly every 11 days. Most recently, AI背书匠 was updated on November 5, 2026 and D2M eFly on October 31, 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.*