Comparison

ADVANTAGE Diary vs FastSloth

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

Head to head
About

ADVANTAGE Diary

Features
Read full description

Do you want to track your pain levels and share them with researchers? Do you want to contribute to the advancement of pain science and management? If so, you might be interested in ADVANTAGE Diary, a new app developed by CDH and the ADVANTAGE consortium. ADVANTAGE Diary is a simple and easy-to-use app that lets you record your pain characteristics, and triggers reminders on a daily basis. ADVANTAGE Diary helps you share your pain data anonymously with the ADVANTAGE consortium, a network of leading pain researchers and clinicians from the United Kingdom. By using this app, you are contributing to a large-scale research project led by the ADVANTAGE consortium, which aims to improve the understanding of pain mechanisms and develop better treatments for people with chronic visceral pain. ADVANTAGE Diary is free to download and use for anyone who wants to record their pain. Whether you have chronic pain or occasional pain, Pain Diary can help you participate in cutting-edge pain research. Download ADVANTAGE Diary today and join the ADVANTAGE community!

About

FastSloth

This app helps you track intermittent fasting with customizable schedules and real-time indicators of your body's stages. It also includes hydration logging, weight tracking with visual progress charts, and smart notifications to keep you on track. All your data stays private on your device.

Highlights
  • Customizable fasting schedules
  • Real-time ketosis and autophagy indicators
  • Hydration logging and reminders
  • Weight tracking with progress charts
  • Streak tracking and milestone badges
  • Home screen widgets
  • Private, no account required
Features
Read full description

No account. No subscription. No data leaves your phone. FastSloth is a private intermittent fasting tracker with fasting insights, **calorie tracking, a personal recipe book**, hydration and weight tracking, Home Screen widgets, and **custom themes with a Theme Builder**. Start fasting in one tap. ## NEW: CALORIE TRACKER & RECIPE BOOK Track your daily calories alongside your fasting progress. Log meals and foods throughout the day, see your calorie totals at a glance, and keep everything together in one simple place. Save your favorite meals in your personal Recipe Book so you can quickly reuse recipes and keep track of what you eat. ## THEMES & THEME BUILDER Choose a built-in theme or create your own. Customize colors and appearance with the Theme Builder and make FastSloth feel like yours. ## FASTING MADE SIMPLE Start with one tap. Choose 16:8, 14:10, 18:6, 20:4, OMAD, or create a custom fasting schedule. See estimated fasting stages as you progress, including fat burning, ketosis, and autophagy. ## CALORIE TRACKING Log your meals and track your daily calorie intake. See how your nutrition fits alongside your fasting schedule, hydration, and weight progress. ## RECIPE BOOK Save and organize your favorite recipes directly in FastSloth. Keep the meals you make most often close at hand and quickly reuse them when tracking what you eat. ## HYDRATION Log water in seconds, track daily progress, and set hydration reminders. See your progress from the Home Screen with the hydration widget. ## WEIGHT & INSIGHTS Track your weight over time with simple charts that make trends easy to see. ## SMART NOTIFICATIONS * Fast start and end alerts * Fasting stage notifications * Water reminders ## STREAKS & MILESTONES Track completed fasts, build streaks, and unlock milestone badges. ## HOME SCREEN WIDGETS See your current fast, hydration progress, and streak without opening the app. ## PRIVATE BY DESIGN No account. No subscription. Your fasting history, calorie logs, recipes, weight, hydration logs, and settings stay on your device. ## FASTING PROTOCOLS * **16:8** * **14:10** * **18:6** * **20:4** * **23:1 / OMAD** * **Custom schedules** Private. Personal. Lightweight. **Download FastSloth and start fasting your way.**

Screenshots

ADVANTAGE Diary4 screens
FastSloth4 screens

Verdict

The call

The clearest difference is in-app purchases: ADVANTAGE Diary at none against FastSloth's 1. ADVANTAGE Diary also leads on iOS requirement (11.0 vs 26.0). FastSloth's advantage is update cadence (every 6 days vs every 16 months). On price, ads and device support 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. FastSloth sells 1 one-off in-app purchase. ADVANTAGE Diary asks for nothing beyond the download.

UpkeepUpdate frequency

ADVANTAGE Diary ships an update every 16 months, FastSloth every 6 days. The most recent releases landed on October 11, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 6 level
ADVANTAGE Diary versus FastSloth: the parameters behind the verdict, then further details
ParameterADVANTAGE DiaryFastSloth
PriceFreeFree
Rating—5.0 (4 ratings) — better
Number of ratings—4 — better
Update frequencyEvery 16 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better26.0
Further details — not scored
Size31 MB9 MB
Age rating17+12+
DeveloperCambridge Digital Health Ltd.Darren Paul

In-app purchases

None

ADVANTAGE Diary

No in-app purchases

1 purchases

FastSloth

One-time1
  • Premium Lifetime$1.99

Questions

Is ADVANTAGE Diary free?
ADVANTAGE Diary is free to download, with no in-app purchases.
Is FastSloth free?
FastSloth is free to download, with in-app purchases available.
Do ADVANTAGE Diary or FastSloth have ads?
Neither ADVANTAGE Diary nor FastSloth shows ads.
Which is updated more often, ADVANTAGE Diary or FastSloth?
ADVANTAGE Diary ships an update every 16 months, and FastSloth every 6 days. Most recently, ADVANTAGE Diary was updated on October 11, 2026 and FastSloth on October 16, 2026.

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