OneCal Calorie Tracker vs Nudge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OneCal Calorie Tracker
This app offers a straightforward approach to tracking daily calorie intake. It focuses on simplicity, allowing users to log their food and monitor their targets without complex calculations or features. The goal is to make calorie management quick and easy, freeing up users' time.
- Science-based calorie tracking
- No macro calculations
- No barcode scanning
- Fast and simple logging
- View calorie targets
- Focus on calories in, calories out
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OneCal is a science-based calorie tracker for people who don’t want to think about weight loss—they just want to do it. No macros to calculate, no barcode scanning, no friend feeds, no badges. Enter the calories that you eat, see your target, and move on. It’s calories in, calories out—fast to log, simple to follow—so you can spend less time in an app and more time living your life. This app provides general information only and is not medical advice. Consult a qualified healthcare professional before making changes to your diet or exercise. OneCal does not diagnose, treat, cure, or prevent any condition and disclaims liability for decisions made based on app data.
Nudge
Easily track your calorie intake by simply taking a photo of your meal. Get instant nutrition estimates and personalized daily targets. An AI coach provides guidance and support to help you reach your weight goals.
- Photo meal logging
- AI-driven calorie and macro estimation
- Smart daily calorie targets
- Weight tracking and trend analysis
- AI coaching for meal guidance
- Private data storage
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Nudge is the calorie tracker that actually fits your life. Snap a photo of your meal. That's it. Nudge identifies what you're eating, estimates calories and macros, and logs it for you — no database scrolling, no barcode scanning, no weighing gram-by-gram. KEY FEATURES • Photo logging — Point your camera at your plate. Get a full nutrition breakdown in seconds. • Smart daily target — Tell Nudge your weight goal and we calculate a calorie target that's actually reachable, based on your height, weight, and activity level. • Weight tracking — Log your weight in lbs or kg. Watch trends over time without obsessing over daily fluctuations. • AI coach — Ask questions, get guidance on your meals, and get gentle nudges toward your goal. Less shame, more support. • Simple, fast, private — Your food and weight data stays yours. NUDGE PRO Unlock unlimited photo logs, full coach access, and advanced analytics with Nudge Pro. Subscription auto-renews monthly until canceled; manage anytime in your Apple ID settings. WHY NUDGE Traditional calorie trackers ask you to do a database's job. Nudge lets the AI do the heavy lifting so you can focus on the choices that actually move the needle — eat, log in 3 seconds, get on with your day. Whether you're losing weight, recomping, or just want to understand what you're eating, Nudge meets you where you are. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://nudge.gs/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: OneCal Calorie Tracker at none against Nudge's 1. Nudge's advantage is ads (none vs shown) and iOS requirement (15.1 vs 18.6). On price, rating, ratings volume and update cadence 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. Nudge sells 1 in-app purchase, starting at $9.99 per month. OneCal Calorie Tracker asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for OneCal Calorie Tracker against 5.0 for Nudge. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
OneCal Calorie Tracker ships an update every 9 days, Nudge every 2 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | OneCal Calorie Tracker | Nudge |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 9 days — better | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Freemium |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 5 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Marcus Spitzmiller | Jordan Rivera |
In-app purchases
OneCal Calorie Tracker
No in-app purchases
Nudge
- Nudge Pro$9.991 Month
