# Pan Diary vs Opelog

The clearest difference is in-app purchases: Opelog at none against Pan Diary's 1. Opelog also leads on update cadence (every 3 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Pan Diary sells 1 one-off in-app purchase. Opelog asks for nothing beyond the download.

Pan Diary ships an update fortnightly, Opelog every 3 days. The most recent releases landed on September 12, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Pan Diary | Opelog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Size | 4 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [亚奇 陈](https://appshunter.io/developer/1879509051) | [Yusei Ando](https://appshunter.io/developer/1881955944) |

## What reviewers say

### Pan Diary

[App page](https://appshunter.io/ios/app/pan-diary-skincare-tracker/id6760187851)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pan Diary - Permanent Buyout | $3.99 | one-time |


### Opelog

[App page](https://appshunter.io/ios/app/opelog-open-date-log/id6766040294)

**In-app purchases:** none


## Frequently asked questions

### Is Pan Diary free?

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

### Is Opelog free?

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

### Do Pan Diary or Opelog have ads?

Neither Pan Diary nor Opelog shows ads.

### Which is updated more often, Pan Diary or Opelog?

Pan Diary ships an update fortnightly, and Opelog every 3 days. Most recently, Pan Diary was updated on September 12, 2026 and Opelog 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.*