# PillDiary vs Knot Diary

The clearest difference is update cadence: Knot Diary at every 11 days against PillDiary's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PillDiary sells 5 in-app purchases, starting at $1.99 per month and Knot Diary sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

PillDiary ships an update monthly, Knot Diary every 11 days. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | PillDiary | Knot Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Size | 34 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [杭州引力网络技术有限公司](https://appshunter.io/developer/1133518651) | [桃花 秦](https://appshunter.io/developer/1877272960) |

## What reviewers say

### PillDiary

[App page](https://appshunter.io/ios/app/pilldiary/id6468035964)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly VIP | $1.99 | per month |
| Annual VIP | $6.99 | per year |
| Month VIP | $2.99 | one-time |
| Lifetime VIP | $12.99 | one-time |
| Annual VIP | $24.99 | one-time |


### Knot Diary

[App page](https://appshunter.io/ios/app/knot-diary/id6801838141)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knot Diary Pro (Monthly) | $0.99 | per month |
| Knot Diary Pro (Quarterly) | $2.99 | per 3 months |
| Knot Diary Pro (Yearly) | $6.99 | per year |


## Frequently asked questions

### Is PillDiary free?

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

### Is Knot Diary free?

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

### Do PillDiary or Knot Diary have ads?

Neither PillDiary nor Knot Diary shows ads.

### Which is updated more often, PillDiary or Knot Diary?

PillDiary ships an update monthly, and Knot Diary every 11 days. Most recently, PillDiary was updated on October 7, 2026 and Knot Diary on October 6, 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.*