# 二次元百科 vs EchoPrompt

The clearest difference is in-app purchases: 二次元百科 at none against EchoPrompt's 1. EchoPrompt's advantage is update cadence (weekly vs monthly) and iOS requirement (13.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. EchoPrompt sells 1 one-off in-app purchase. 二次元百科 asks for nothing beyond the download.

二次元百科 ships an update monthly, EchoPrompt weekly. The most recent releases landed on September 14, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 二次元百科 | EchoPrompt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/echoprompt/id6758967070/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Ad-supported |
| Size | 3 MB | 12 MB |
| Requires iOS | 17.0 | **13.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 9+ |
| Developer | [宏 林](https://appshunter.io/developer/1496915311) | [瑞华 张](https://appshunter.io/developer/1608130007) |

## What reviewers say

### 二次元百科

[App page](https://appshunter.io/ios/app/id1496915312)

**Features:** macOS Compatibility

**In-app purchases:** none


### EchoPrompt

[App page](https://appshunter.io/ios/app/echoprompt/id6758967070)

This tool helps creators, speakers, and educators deliver polished performances by providing a distraction-free teleprompter. It offers adjustable scrolling, mirror mode, and text customization to ensure smooth, confident delivery on camera or stage.

**Highlights:** Adjustable scrolling speed, Mirror mode, Loop playback, Focus guide, Flexible text sizing, Distraction-free interface

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| InFlow Pro | $9.99 | one-time |


## Frequently asked questions

### Is 二次元百科 free?

二次元百科 is free to download, with no in-app purchases.

### Is EchoPrompt free?

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

### Do 二次元百科 or EchoPrompt have ads?

Neither 二次元百科 nor EchoPrompt shows ads.

### Which is updated more often, 二次元百科 or EchoPrompt?

二次元百科 ships an update monthly, and EchoPrompt weekly. Most recently, 二次元百科 was updated on September 14, 2026 and EchoPrompt on September 10, 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.*