Comparison

GutCheck vs Nistis

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

Head to head
About

GutCheck

This nutrition companion goes beyond calorie counting to help you understand how your diet impacts your health and energy. It offers effortless meal logging, comprehensive tracking of various dietary needs, and seamless integration with health devices.

Highlights
  • Effortless meal logging via photo or text
  • Comprehensive tracking (Macros, Keto, GI)
  • Syncs with Apple Health and Fitbit
  • Nutrition intelligence and pattern recognition
  • Personalized feedback and actionable advice
  • Visual progress charts and smart trends
Features
Read full description

Unlock your body's potential with GutCheck, the nutrition companion that goes beyond simple calorie counting. GutCheck isn't just about numbers; it's about understanding you. By combining effortless meal logging with advanced pattern recognition, GutCheck helps you discover exactly how your nutrition impacts your health, energy, and goals. Key Features: Effortless Meal Logging: Forget the tedious searching. Snap a photo, type a few words, or reuse a past meal with just one click. GutCheck breaks down the rest. Comprehensive Tracking: Tack the metrics that matter most to your specific lifestyle. This Includes Macros, Keto, Intermittent Fast, Glycemic Index & more Seamless Integration: Connected to your life. Automatically syncs with Apple Health and Fitbit (with more integrations to come) to pull in your activity, steps, and weight data, keeping your health picture complete without the manual work. Nutrition Intelligence: Identify hidden patterns in your habits. GutCheck connects the dots between what you eat and your health metrics, giving you a true understanding of your body's needs. Purposeful Insights: Turn raw data into actionable advice. Receive personalized feedback designed to help you optimize your diet, whether you're focusing on gut health, weight management, or peak performance. Smart Trends: Visualise your journey with beautiful, intuitive charts that track your consistency and progress over time. Stop guessing. Step scrolling through tedious databases. Download GutCheck for free. Start your meal diary today and experience nutrition intelligence designed to fit your busy schedule. GutCheck. Your Body. By Design.

About

Nistis

This app helps you track fasting periods with customizable timers and editing capabilities. It offers a free version with core features and an optional one-time purchase for advanced functionalities like Apple Watch integration and health syncing.

Highlights
  • Customizable fasting timers (16:8, OMAD, etc.)
  • Editable fasting history
  • Stage timeline with common fasting phases
  • Offline functionality
  • Optional iCloud sync
  • Apple Watch app
  • Home screen and lock screen widgets
Features
Read full description

A fasting timer. That's it. Free to use, no account, no ads, no AI coach, no subscription required — upgrade once and keep it forever. Fix a forgotten fast in two taps. Your data stays on your device and exports any time. THE TIMER Pick a preset — 16:8, 18:6, 20:4, OMAD, 5:2 — or set a custom fast. One big ring shows elapsed, remaining, or percent; tap to switch. Started fasting before you opened the app? Adjust the start time mid-fast. Ending early or late? The end time is editable too. No lectures either way. YOUR HISTORY IS YOURS TO EDIT Every fasting app makes logging mistakes. Nistis is the one that lets you fix them: any fast, any field, any time — including days you forgot entirely. Tap an empty day, add the fast, done. Streaks and stats recompute instantly. No punishment screens. STAGES, NOT SERMONS A simple timeline shows the stages commonly associated with fasting — digesting, fat burning, ketosis ramp — with honest, hedged language and no medical claims. FREE MEANS FREE The timer, every preset, unlimited history with full editing, streaks, stats, notifications, and a home-screen widget. Free forever — in writing. Whatever ships free stays free. Available in 34 languages. NISTIS PRO — PAY ONCE IF YOU WANT MORE • Apple Watch app with complications — start and end from your wrist • Live Activity and Dynamic Island — your fast on the lock screen • Every widget style, including lock-screen widgets • Apple Health sync for weight and water • Advanced stats: trends, completion rate, weight overlay • Import from other fasting apps (first import free) and export any time $2.99/month, $14.99/year, or $29.99 once — yours for life. Other fasting apps charge $69.99 every year for less. PRIVATE BY ARCHITECTURE No account. No ads. No tracking SDKs. Works completely offline; optional iCloud sync uses your private iCloud, which we can't read. The only thing the app ever phones is Apple's purchase system. Check our App Store privacy label against any other fasting app — that's the whole pitch. Nistis — Greek νήστις, "the one who fasts." Pronounced NISS-tis. Not medical advice. Consult a doctor before changing your eating pattern. Privacy policy: https://nistis.com/privacy Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

GutCheck4 screens
Nistis4 screens

Verdict

The call

The clearest difference is in-app purchases: GutCheck at none against Nistis's 3. GutCheck also leads on iOS requirement (15.0 vs 17.0). Nistis's advantage is ratings volume (3 vs 1). On price, rating, 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. Nistis sells 3 in-app purchases, starting at $2.99 per month. GutCheck asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for GutCheck against 5.0 for Nistis. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Scorecard4 real differences · 6 level
GutCheck versus Nistis: the parameters behind the verdict, then further details
ParameterGutCheckNistis
PriceFreeFree
Rating5.0 (1 ratings)5.0 (3 ratings)
Positive reviews100.0% of reviews—
Number of ratings13 — better
Update frequency—Every 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.0 — better17.0
Further details — not scored
Size101 MB23 MB
Age rating12+4+
DeveloperMohamad El IzmirliLittle Theta LLC

Customer experience

GutCheck

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Nistis

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

GutCheck

No in-app purchases

3 purchases

Nistis

Subscriptions2
  • Pro Monthly$2.991 Month
  • Pro Annual7 Days trial$14.991 Year
One-time1
  • Pro Lifetime$29.99

Questions

Is GutCheck free?
GutCheck is free to download, with no in-app purchases.
Is Nistis free?
Nistis is free to download, with in-app purchases available.
Which has better reviews, GutCheck or Nistis?
GutCheck and Nistis are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.
Do GutCheck or Nistis have ads?
Neither GutCheck nor Nistis shows ads.

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