Carb Manager—Keto Diet Tracker

What it does

Carb Manager is a comprehensive mobile app designed to help users track their nutrition, primarily for low-carb and ketogenic diets. It goes beyond simple calorie counting, offering tools to log meals, create custom foods and recipes, track exercise, monitor body measurements, and connect with a community for support and motivation.

Where it shines

Carb Manager excels by making the often tedious process of diet tracking feel both personal and empowering. The onboarding quiz (00:30) isn't just a data form; it's an investment-building exercise that culminates in a personalized plan (01:54), making the user feel understood from the start. The app's food logging capabilities are another high point. Instead of just searching a database, users can create detailed custom foods (06:16) and multi-step recipes (08:26), effectively building their own personalized food library over time. This transforms a daily chore into a system that gets smarter and faster with use.

UX highlights

Structured Onboarding: The app uses a six-step quiz with a clear progress bar to guide users through goal setting. This creates a sense of momentum and accomplishment early on.
Interactive Data Input: The activity level slider at 01:13, which visually updates an illustration as the user moves it, is a small but delightful piece of interactive design.
Gamified Community: The "Challenges" feature (12:11) turns dieting into a game, with points awarded for daily logging and hitting goals. This adds a layer of motivation and accountability.
Flexible Food Management: Users can log a food for the current meal, plan it for a future meal, or set it to repeat (04:41). This flexibility accommodates real-life planning habits.
Contextual Tooltips: The app uses small info icons, like the one for Barcode at 06:44, to provide helpful context without cluttering the UI.
Celebratory Feedback: Toggling "I'm Done Logging Today" at 12:00 triggers a fun confetti animation, providing positive reinforcement for completing a daily goal.

Monetization & growth

Monetization is introduced immediately after the user's personalized plan is revealed. At 02:02, a soft paywall appears, offering three subscription tiers (Yearly, Quarterly, Monthly) without a free trial. The paywall is comprehensive, leveraging multiple conversion tactics in one long scroll. It features a prominent "Save 61%" discount for the annual plan, a large section of user testimonials with before-and-after photos (02:03), a feature comparison table (02:42), and an embedded video. Premium features are also gated contextually throughout the app, such as the "Insights" tab (16:40) and advanced recipe features, each with a call-to-action that leads back to the main paywall.

Who it’s for

This app is clearly built for individuals committed to a low-carb or ketogenic lifestyle, moving beyond casual calorie counting. It's ideal for users who cook frequently and want to accurately track their own recipes, as well as those who thrive on community support and gamified challenges to stay motivated. The detailed tracking and planning features suggest a target audience that is data-driven and serious about achieving specific health outcomes like weight loss or managing glucose.

Notes & opportunities

The app is incredibly feature-rich, which can be overwhelming for a brand new user. The main dashboard presents a lot of information at once. A guided tour or a more progressive reveal of features after onboarding could ease new users into the experience. Additionally, the password creation step at 01:34 shows requirements in a tooltip that only appears on tap; showing these requirements proactively could reduce friction. Finally, the extensive paywall, while thorough, could be tested against a shorter, more focused version to see if it improves conversion.