# Echo vs Diffu

The clearest difference is ads: Echo at none against Diffu's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Echo sells 1 in-app purchase, starting at $6.99 per month and Diffu sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 26, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Echo | Diffu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/echo-stream-your-mind/id6757453505/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 46 MB | 73 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Stage5 Tools LLC](https://appshunter.io/developer/1867077883) | [Jeong-Hwan Jang](https://appshunter.io/developer/1880755654) |

## What reviewers say

### Echo

[App page](https://appshunter.io/ios/app/echo-stream-your-mind/id6757453505)

This app provides a unique daily journaling experience by offering AI-generated reflection questions. It enforces a no-editing policy, submitting responses after a short inactivity period to encourage raw, honest thought expression. An AI then grades and auto-polishes your writing.

**Highlights:** Daily AI-generated reflection questions, No-backspace writing experience, 10-second inactivity auto-submit, AI grading system, Auto-polish for grammar, Build a daily streak

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Pro Monthly | $6.99 | per month |


### Diffu

[App page](https://appshunter.io/ios/app/diffu-something-to-say/id6759802088)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diffu Premium | $2.99 | per month |
| Diffu Premium | $29.99 | per year |
| 100 엠버 | $0.49 | one-time |
| 500 엠버 | $2.99 | one-time |
| 1000 엠버 | $6.99 | one-time |
| 3000 엠버 | $19.99 | one-time |


## Frequently asked questions

### Is Echo free?

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

### Is Diffu free?

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

### Do Echo or Diffu have ads?

Diffu shows ads; Echo does not.

### Which is updated more often, Echo or Diffu?

Echo ships an update every 2 weeks, and Diffu every 2 weeks. Most recently, Echo was updated on September 26, 2026 and Diffu on September 8, 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.*