# Dian Dian vs Attention Flow

The clearest difference is in-app purchases: Attention Flow at none against Dian Dian's 3. Attention Flow also leads on ads (none vs shown). Dian Dian's advantage is update cadence (every 5 days vs every 11 days) and iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Dian Dian sells 3 in-app purchases, starting at $1.99 per month. Attention Flow asks for nothing beyond the download.

Dian Dian ships an update every 5 days, Attention Flow every 11 days. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Dian Dian | Attention Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 11 days |
| Size | 65 MB | 8 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Override SAS](https://appshunter.io/developer/1888186144) | [可心 周](https://appshunter.io/developer/1868083044) |

## What reviewers say

### Dian Dian

[App page](https://appshunter.io/ios/app/dian-dian-year-tracker/id6761432329)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Yearly | $8.99 | per year |
| Premium Lifetime | $22.99 | one-time |


### Attention Flow

[App page](https://appshunter.io/ios/app/attention-flow/id6775757600)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Dian Dian free?

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

### Is Attention Flow free?

Attention Flow is free to download, with no in-app purchases.

### Do Dian Dian or Attention Flow have ads?

Dian Dian shows ads; Attention Flow does not.

### Which is updated more often, Dian Dian or Attention Flow?

Dian Dian ships an update every 5 days, and Attention Flow every 11 days. Most recently, Dian Dian was updated on October 19, 2026 and Attention Flow on October 7, 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.*