# AI Notes For iPhone vs Countdown Days

The clearest difference is in-app purchases: AI Notes For iPhone at none against Countdown Days's 3. Countdown Days's advantage is update cadence (every 5 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Countdown Days sells 3 in-app purchases, starting at $1.29 per month. AI Notes For iPhone asks for nothing beyond the download.

AI Notes For iPhone ships an update every 4 months, Countdown Days every 5 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | AI Notes For iPhone | Countdown Days |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Size | 4 MB | 45 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thi Quynh Nhung Cao](https://appshunter.io/developer/1854040975) | [长宏 侯](https://appshunter.io/developer/1726037103) |

## What reviewers say

### AI Notes For iPhone

[App page](https://appshunter.io/ios/app/ai-notes-for-iphone/id6760284798)

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

**In-app purchases:** none


### Countdown Days

[App page](https://appshunter.io/ios/app/countdown-days-events-and-widgets/id6792184671)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $1.29 | per month |
| Pro (Yearly) | $9.99 | per year |
| Pro (Lifetime) | $24.99 | one-time |


## Frequently asked questions

### Is AI Notes For iPhone free?

AI Notes For iPhone is free to download, with no in-app purchases.

### Is Countdown Days free?

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

### Do AI Notes For iPhone or Countdown Days have ads?

Neither AI Notes For iPhone nor Countdown Days shows ads.

### Which is updated more often, AI Notes For iPhone or Countdown Days?

AI Notes For iPhone ships an update every 4 months, and Countdown Days every 5 weeks. Most recently, AI Notes For iPhone was updated on November 9, 2026 and Countdown Days 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.*