Outflow Diary vs Pee
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Outflow Diary
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Free, simple, and ad-free app for tracking your liquid intake and discharges.
Pee
This app helps you build strength and stay hydrated by integrating simple exercises with your natural bathroom breaks. It uses habit stacking and frequent, low-intensity practice to build muscle without dedicated gym time.
- Log exercises with one tap
- Track hydration and workout data
- Competitive leaderboards
- Apple Health integration
- iOS widget and watchOS support
- Habit stacking method
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Drink water. Pee. Do push-ups. Welcome to Pee-ups! Fitness doesn't have to mean hours at the gym. It's built on small, consistent habits — repeated often enough that they stick. Did you know the average person pees 6 to 8 times a day? Commit to just 10 push-ups every time you take a trip to the bathroom and you'll naturally complete 60 to 80 push-ups a day. That's over 2,000 push-ups a month, almost entirely without dedicated workout sessions. THE METHOD Pee-ups is built on two proven ideas: • Habit stacking (from Atomic Habits): the easiest way to build a new habit is to attach it to something you already do automatically. Your natural hydration cycle becomes the trigger for a quick set. • Greasing the groove (popularized by strength coach Pavel Tsatsouline): strength is a skill you build through frequent, sub-maximal practice spread across the day — never training to failure. Because your bathroom breaks are naturally spaced out, Pee-ups greases the groove for you, turning dozens of easy, fresh sets into real strength without burnout. FEATURES • Log in 1 Tap: Quickly record completed sets or queue them to complete later if you're in a public bathroom. • Track Hydration & Workouts: See custom charts matching your fluid intake to your exercise repetitions. • Competitive Leaderboards: Join global or private groups to stack up reps against friends and see who stays the most hydrated. • Apple Health Integration: Natively logs your functional strength training workouts and water intake (in US fluid ounces) directly to Apple Health. • iOS Widget & watchOS Support: View your stats and log reps instantly from your Home Screen widgets or directly from your Apple Watch. Stop setting massive goals that fall apart. Capitalize on your body's natural daily cycle. Hydrate, stay active, and conquer your goals with Pee-ups. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Outflow Diary at none against Pee's 2. Pee's advantage is update cadence (every 2 days 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
Both are free to download. Pee sells 2 in-app purchases, starting at $0.99 per month. Outflow Diary asks for nothing beyond the download.
Outflow Diary ships an update every 6 months, Pee every 2 days. The most recent releases landed on September 11, 2026 and September 14, 2026 respectively.
| Parameter | Outflow Diary | Pee |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 6 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 18.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 6 MB | 48 MB |
| Age rating | 4+ | 9+ |
| Developer | FlyOver Solutions, LLC | Hoverstone LLC |
In-app purchases
Outflow Diary
No in-app purchases
Pee
- Premium Monthly$0.991 Month
- Premium Yearly7 Days trial$4.991 Year









