Comparison

Pee Diary vs Outflow Diary

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Bladder health diary

About

Pee Diary

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An easy way to record voiding data, as an alternative to a paper diary. Keeping a bladder diary is a common recommendation for a wide range of conditions. Convenient export to text file, so you can show it to your therapist. Supports separate records for voiding through catheter and urethra, as well as with urinary bag, which can be helpful for tracking bladder training. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Outflow Diary

Features

Read full description

Free, simple, and ad-free app for tracking your liquid intake and discharges.

Screenshots

Pee Diary2 screens

Outflow Diary4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 4 level

Pee Diary versus Outflow Diary: the parameters behind the verdict, then further details
Parameter	Pee Diary	Outflow Diary
Price	Free	Free
Update frequency	Every 6 weeks — better	Every 6 months
Ads	No	No
In-app purchases	Yes	No — better
Devices	iPhone, iPad, Mac — better	iPhone, iPad
Requires iOS	17.2 — better	18.0
Further details — not scored
Size	4 MB	6 MB
Age rating	4+	4+
Developer	Veniamin Gribkov	FlyOver Solutions, LLC

In-app purchases

1 purchases

Pee Diary

Subscriptions1

Monthly Subscription$0.991 Month

None

Outflow Diary

No in-app purchases

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.