Comparison

Fasting Tracker vs GKI Insights

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

Head to head
About

Fasting Tracker

Track your intermittent fasting with a live timer and progress ring. Choose from various plans, monitor fasting stages, and log water intake. Offers home screen widgets and live activity for easy tracking without opening the app.

Highlights
  • Live fasting timer with progress ring
  • Multiple fasting plans (12:12 to OMAD)
  • Home Screen widgets and Live Activity
  • Water intake tracker
  • Fasting stage information
  • Edit start time and completion notifications
Features
Read full description

Track your intermittent fasting with a clear, live timer. Pick a plan, tap start and watch the progress ring fill up while the app shows how long you've fasted and how much is left. Follow your fast without opening the app: Home Screen widgets, a Live Activity on the Lock Screen and the Dynamic Island. FREE • Live fasting timer with a progress ring • Plans: 12:12, 14:10, 16:8, 18:6, 20:4 and OMAD (23:1) • Live fasting stages (blood sugar, fat burning, ketosis, autophagy and more) as you reach them • Forgot to tap start? Edit your start time • A notification when your fast is complete • History of your last 7 days and your current streak • Water intake tracker • Home Screen widgets • Live Activity and Dynamic Island • Light and dark mode PREMIUM • Extended and custom fasts: 24h, 36h, 48h or any duration you choose • Full history with a calendar and your best streak • Stats and charts: average fast, longest fast, total hours and a weekly chart • A daily reminder to start your fast, plus stage notifications • Weight tracking with a chart and optional Apple Health sync • Export your fasts to CSV ABOUT FASTING STAGES The stages shown in the app are general information about what commonly happens during a fast. They are not medical advice, and timing varies from person to person. Talk to your doctor before you start fasting, especially before long fasts or if you are pregnant or breastfeeding, have diabetes or another medical condition, or take medication. SUBSCRIPTION TERMS The app is free to download and use. Premium is optional: • Annual: USD 29.99 per year, with a 7-day free trial • Weekly: USD 3.99 per week • Lifetime: USD 49.99, one-time purchase Prices may vary by country; the price for your region is shown in the app before you buy. Payment is charged to your Apple ID when you confirm the purchase, or when the free trial ends for the annual plan. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period, and your account is charged for the renewal within the 24 hours before the period ends. You can manage or cancel your subscription in your App Store account settings. Any unused part of the free trial is forfeited when you buy a subscription. Privacy Policy: https://www.enduranceapptitude.com/apps/fasting-timer/privacy-policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

GKI Insights

Read full description

GKI Insights makes it effortless to track your Glucose Ketone Index (GKI) and understand your metabolic health. Log your glucose and ketone levels, and get instant GKI scores with clear feedback on your current ketosis state—from low to optimal. Each entry lets you add context like meals, sleep quality, and fasting windows to build a clearer picture over time. Use the dashboard for quick overviews, or explore detailed trends and weekly analysis to see how your choices are affecting your GKI. Built-in AI offers summary insights and recommendations based on your entries—no guesswork, just clarity. Whether you're following keto, intermittent fasting, or managing metabolic health, GKI Insights gives you simple, effective tools to stay on track. Key Features: - Log glucose and ketones in seconds - Automatically calculate your GKI and metabolic state - Add context: last meal, sleep, fasting period, and notes - Visual trends and weekly summaries - AI-generated insights and recommendations Clean, focused design with zero clutter. Please note: the information provided by this app is for informational purposes only and is not a substitute for professional medical advice. Always consult a qualified healthcare provider before making health decisions. Terms of Use: https://gkiinsights.app/terms

Screenshots

Fasting Tracker4 screens
GKI Insights4 screens

Verdict

The call

The clearest difference is device support: GKI Insights at 3 against Fasting Tracker's 1. GKI Insights also leads on iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases 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. Fasting Tracker sells 6 in-app purchases, starting at $0.99 per 7 days and GKI Insights sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
Fasting Tracker versus GKI Insights: the parameters behind the verdict, then further details
ParameterFasting TrackerGKI Insights
PriceFreeFree
Rating3.7 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size19 MB24 MB
Age rating4+4+
DeveloperLucas DiazS J BENSON

In-app purchases

6 purchases

Fasting Tracker

Subscriptions5
  • Premium$0.997 Days
  • Premium$2.991 Month
  • Premium Weekly$3.997 Days
Show 2 more
  • Premium Monthly1 Month trial$7.991 Month
  • Premium Annual7 Days trial$29.991 Year
One-time1
  • Premium Lifetime$49.99
3 purchases

GKI Insights

Subscriptions2
  • GKI Insights+ Monthly$4.991 Month
  • GKI Insights Plus Annual$29.991 Year
One-time1
  • GKI Insights+ Lifetime$79.99

Questions

Is Fasting Tracker free?
Fasting Tracker is free to download, with in-app purchases available.
Is GKI Insights free?
GKI Insights is free to download, with in-app purchases available.
Do Fasting Tracker or GKI Insights have ads?
Neither Fasting Tracker nor GKI Insights shows ads.

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