SDay vs WeightSnap AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SDay
Simplify your life and enhance productivity with this straightforward application. It aims to cut through complexity, offering tools to help you achieve more. Designed for ease of use, it focuses on improving daily routines.
- Life improvement tools
- Productivity boost
- Simplified interface
- Focus on daily routines
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A super-simple app to improve your life and boost your productivity in a world that is too complicated.
WeightSnap AI
Effortlessly track your weight and body metrics with AI-powered photo recognition. Scan scale readings and food plates for instant logging and nutritional estimates. Get personalized insights and analyze trends to support your health journey.
- Instant OCR weight logging from scale photos
- AI nutritional estimates from food photos
- Personalized AI insights and trend analysis
- Track waist measurements and progress photos
- Smart workout logging with weather data
- Local data backups and privacy-focused storage
- Unit conversion for weight, length, and temperature
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Track your weight effortlessly with WeightSnap, the AI-powered health companion that eliminates manual data entry. Simply snap a photo of your scale, and our advanced OCR technology instantly recognizes and logs your weight. Key Features: •Instant OCR Recognition: Use your camera or gallery to scan scale readings with high precision using native Vision frameworks. •Food & Meal Snap: Snap a photo of your plate to get AI-powered nutritional estimates (calories, protein, carbs, fat) and track your eating habits. •AI Insights: Get personalized reports on weight fluctuations, waist correlations, and trend analysis powered by AI. •Comprehensive Body Metrics: Track waist measurements, custom parameters (like body fat or clothes weight), and progress photos. •Smart Workout Logging: Log indoor and outdoor sessions. Automatically retrieve local weather data (temperature/humidity) to see how environment affects your performance. •Privacy First: Your data stays yours. Enjoy daily local backups and secure storage recovery policies. •Unit Conversion: Seamlessly switch between kg/lb, cm/inches, and Celsius/Fahrenheit. •Integration with Garmin, Fitbit, Withings, Wyze and many other Smart Watches and Scales through HealthKit Whether you're on a weight loss journey or tracking fitness gains, WeightSnap provides the analytics you need to succeed.
Screenshots
Verdict
The clearest difference is ads: SDay at none against WeightSnap AI's shown. WeightSnap AI's advantage is update cadence (every 3 days vs monthly) and monetization model (ad-supported vs freemium). On price, rating, review sentiment and ratings volume 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. SDay sells 3 in-app purchases, starting at $4.99 per month and WeightSnap AI sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for SDay against 5.0 for WeightSnap AI. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews are what separate them: 96% of SDay's written reviews are positive against 100% of WeightSnap AI's.
SDay ships an update monthly, WeightSnap AI every 3 days. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.
| Parameter | SDay | WeightSnap AI |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (4 ratings) |
| Positive reviews | 95.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 4 — better |
| Update frequency | Monthly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Ad-supported — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 54 MB | 84 MB |
| Age rating | 17+ | 4+ |
| Developer | Kirill Karavaev | OLEG STASYUK |
Customer experience
SDay
WeightSnap AI
In-app purchases
SDay
- SDay Pro Monthly$4.991 Month
- SDay Pro Annual$49.991 Year
- SDay Pro Lifetime$149.99
WeightSnap AI
- Monthly Premium7 Days trial$7.991 Month
- Annual Premium7 Days trial$79.991 Year









