Comparison

slotho vs Fast

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

Head to head
About

slotho

Features
Read full description

slotho is a food, drink, sleep, workout and fasting diary that also tells you how those things connect. The thinking happens on your device, and everything you log goes to Apple Health, where it stays yours. LOG IT IN SECONDS - Search a food, scan a barcode, photograph a plate, or type "two eggs and a coffee" - Hundreds of common foods built in, most with their own illustration, and Open Food Facts for the rest - Drinks log what is actually in them: water, caffeine and alcohol - Meals, favorites and plans you can reuse - Log from Apple Watch, the Home Screen, Siri or a Shortcut HOW FOOD MAKES YOU FEEL - Six digestion symptoms with severity, and a symptom-free day counts as evidence too - Mood check-ins through Apple Health's State of Mind - slotho looks for foods that show up before a symptom, using only your own logs, and says so only once the evidence is there - Correlations across sleep, digestion, energy, caffeine, alcohol and heart-rate variability YOUR DAY IN ONE VIEW - A daily balance from sleep, food, activity and recovery - Energy in against energy spent, plus macros, fibre, sugar and electrolytes - Water, caffeine and alcohol - Home Screen and Lock Screen widgets, and an Apple Watch complication FASTING - An eating window for each day of the week - Your fast starts when you actually finished eating, not when the schedule said you would - Stage notifications, and a morning recap for the ones you slept through SLEEP AND RECOVERY - Stages, duration, and how regular your nights are - Resting heart rate and heart-rate variability against your own baseline, never a population figure - Training load: this week against your last four WORKOUTS - Build plans on iPhone, run them from your wrist - Timed sets, rests, and exercise notes read aloud on the watch - Sloth Pacing ends a rest when your heart rate has come back, not when a timer says so - Save finished workouts and nights of sleep to Calendar - slotho only ever adds events, and never reads your calendar PRIVATE BY DEFAULT - Correlations are worked out on your device - Photos sent for analysis are stripped of location, capture time and camera details first - No account, no advertising, no tracking FREE, AND PRO Free is a complete diary: unlimited food, drink and symptom logging, the fasting timer, unlimited meal and workout plans, and logging on Apple Watch. Pro adds your daily balance score, the correlations, weekly recaps, your full history, the gallery view and Sloth Pacing - monthly or yearly, with a free trial. Also on iPad and Mac, kept in step through Apple Health and iCloud. Terms & Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Fast

Features
Read full description

Feel Better. Stay on Track. Your Fasting Journey, Made Simple. Build healthy habits and stay in tune with your body—without the clutter or complexity. This beautifully simple app helps you track intermittent fasting in a calm, intuitive way that fits effortlessly into your daily routine. Why You’ll Love It: • No accounts, no login, no tracking. Your data, your device. • Gentle, Simple Tracking: Start and stop fasts with just a tap. No distractions, just a clear view of your progress. • Apple Watch Ready: Track your fasts directly from your wrist—even without your phone nearby. • At-a-Glance Insights: Stay mindful of your fasts with elegant widgets on your iPhone and Apple Watch. • Private by Design: Your data is stored securely in your personal iCloud account. Nothing ever leaves your devices. Whether you’re fasting for wellness, focus, or energy, this app is your quiet companion on the journey.

Screenshots

slotho4 screens
Fast4 screens

Verdict

The call

The clearest difference is in-app purchases: Fast at none against slotho's 2. slotho's advantage is iOS requirement (17.6 vs 26.0). On price, update cadence, 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. slotho sells 2 in-app purchases, starting at $0.99 per month. Fast asks for nothing beyond the download.

UpkeepUpdate frequency

slotho ships an update every 10 days, Fast every 2 weeks. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

Scorecard2 real differences · 4 level
slotho versus Fast: the parameters behind the verdict, then further details
ParameterslothoFast
PriceFreeFree
Update frequencyEvery 10 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS17.6 — better26.0
Further details — not scored
Size55 MB35 MB
Age rating12+4+
DeveloperLuiz Carlos Maia JuniorCodeHive

In-app purchases

2 purchases

slotho

Subscriptions2
  • PRO Search Monthly7 Days trial$0.991 Month
  • PRO Search Yearly7 Days trial$9.991 Year
None

Fast

No in-app purchases

Questions

Is slotho free?
slotho is free to download, with in-app purchases available.
Is Fast free?
Fast is free to download, with no in-app purchases.
Do slotho or Fast have ads?
Neither slotho nor Fast shows ads.
Which is updated more often, slotho or Fast?
slotho ships an update every 10 days, and Fast every 2 weeks. Most recently, slotho was updated on October 2, 2026 and Fast on September 30, 2026.

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