GutCheck vs Nistis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- 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
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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
Verdict
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
Both are free to download. Nistis sells 3 in-app purchases, starting at $2.99 per month. GutCheck asks for nothing beyond the download.
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.
| Parameter | GutCheck | Nistis |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 3 — better |
| Update frequency | — | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 101 MB | 23 MB |
| Age rating | 12+ | 4+ |
| Developer | Mohamad El Izmirli | Little Theta LLC |
Customer experience
GutCheck
Nistis
In-app purchases
GutCheck
No in-app purchases
Nistis
- Pro Monthly$2.991 Month
- Pro Annual7 Days trial$14.991 Year
- Pro Lifetime$29.99









