# Outflow Diary vs Bladder Diary

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

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

Outflow Diary ships an update every 6 months, Bladder Diary monthly. The most recent releases landed on September 11, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Outflow Diary | Bladder Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/bladder-diary-vesi/id6739755941/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 9 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [FlyOver Solutions, LLC](https://appshunter.io/developer/1608073409) | [IVANA RAST](https://appshunter.io/developer/1782298960) |

## What reviewers say

### Outflow Diary

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Bladder Diary

[App page](https://appshunter.io/ios/app/bladder-diary-vesi/id6739755941)

Track urination, leaks, urgency, and hydration with this private diary. Generate PDF reports for your healthcare provider. Ideal for monitoring bladder health, pregnancy changes, or hydration during hot weather.

**Highlights:** Log urination, fluid intake, and duration, Track leaks, urgency, and nighttime trips, Review bladder health patterns and trends, Generate shareable PDF reports, No account required for immediate use

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bladder Diary Premium | $9.99 | one-time |


## Frequently asked questions

### Is Outflow Diary free?

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

### Is Bladder Diary free?

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

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

Neither Outflow Diary nor Bladder Diary shows ads.

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

Outflow Diary ships an update every 6 months, and Bladder Diary monthly. Most recently, Outflow Diary was updated on September 11, 2026 and Bladder Diary on September 18, 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.*