# Pee Diary vs Outflow Diary

The clearest difference is in-app purchases: Outflow Diary at none against Pee Diary's 1. Pee Diary's advantage is update cadence (every 6 weeks vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Pee Diary sells 1 in-app purchase, starting at $0.99 per month. Outflow Diary asks for nothing beyond the download.

Pee Diary ships an update every 6 weeks, Outflow Diary every 6 months. The most recent releases landed on September 7, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Pee Diary | Outflow Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 6 months |
| Size | 4 MB | 6 MB |
| Requires iOS | **17.2** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Veniamin Gribkov](https://appshunter.io/developer/907913370) | [FlyOver Solutions, LLC](https://appshunter.io/developer/1608073409) |

## What reviewers say

### Pee Diary

[App page](https://appshunter.io/ios/app/pee-diary/id6496853206)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |


### Outflow Diary

[App page](https://appshunter.io/ios/app/outflow-diary/id6737697386)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pee Diary free?

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

### Is Outflow Diary free?

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

### Do Pee Diary or Outflow Diary have ads?

Neither Pee Diary nor Outflow Diary shows ads.

### Which is updated more often, Pee Diary or Outflow Diary?

Pee Diary ships an update every 6 weeks, and Outflow Diary every 6 months. Most recently, Pee Diary was updated on September 7, 2026 and Outflow Diary on September 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*