Gramì vs D3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gramì
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Gramì is the fastest way to calculate the exact nutritional values of any food based on the weight you actually ate. No account required, no complex forms. Just enter the values from the label (per 100 g) and the weight consumed — Gramì instantly shows calories, carbohydrates, proteins and fats for your portion. Save your favourite products and recipes locally to reuse them anytime with a single tap.
D3
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Track your daily Vitamin D3 from sun exposure and supplements — privately, on-device. D3-Sync estimates how much Vitamin D you synthesize while you're outside, based on your skin type, the local UV index, and how much skin you have exposed. Add supplements with one tap. See your daily total on the dashboard, home-screen widget, Lock Screen widget, Apple Watch, and the Live Activity / Dynamic Island during active sun sessions. FREE FEATURES • Real-time UV index for your location • Manual supplement logging in IU • Daily progress ring with goal • Small home-screen widget • Apple Watch progress ring + supplement logging • Apple Health integration (read & write Vitamin D) PRO (subscription or lifetime) • Active sunbathing timer with sunburn-prevention safety • Live Activity & Dynamic Island for live sessions • Passive background tracking (no timer required) • Smart sun-window alerts using forecast UV • Lock-Screen widgets and the medium home-screen widget • Apple Watch UV insights and advanced complications • Weekly & monthly trends with Apple Health comparison • CSV history export for your healthcare provider • On-device skin type analyzer (camera + Vision) • Removal of all advertising PRIVACY Your skin profile, location, and Health data stay on your device or in your private iCloud. We never sell or share personal data. Ads (free tier only) use Apple's privacy-preserving SKAdNetwork. DISCLAIMER D3-Sync provides estimates and is not medical advice. Always consult a qualified healthcare professional before changing supplementation, sun exposure, or treatment. Terms of Use (EULA): https://bigkrzyh.github.io/D3-Sync/terms.html Privacy Policy: https://bigkrzyh.github.io/D3-Sync/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Gramì at none against D3's 3. Gramì also leads on ads (none vs shown) and iOS requirement (15.6 vs 18.6). On price 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. D3 sells 3 in-app purchases, starting at $2.99 per month. Gramì asks for nothing beyond the download.
| Parameter | Gramì | D3 |
|---|---|---|
| Price | Free | Free |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 29 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Alessandro Bellotti | Krzysztof Kuzmicki |
In-app purchases
Gramì
No in-app purchases
D3
- Monthly7 Days trial$2.991 Month
- Yearly7 Days trial$19.991 Year
- D3-Sync Pro Lifetime$49.99









