What it does
Fastie is a mobile app designed to help users manage their weight and improve their health through intermittent fasting and nutritional tracking. The app creates a personalized plan based on a user's goals, biometrics, and lifestyle habits. Its core features include a fasting timer, a water intake tracker, and a multi-modal calorie counter that uses AI to analyze meals from text descriptions or photos.
Where it shines
Fastie excels at making the data collection process feel rewarding and interactive. During its extensive onboarding quiz, the app presents a projected weight loss timeline (01:19). After the user provides more detailed habit information, it recalculates and presents an accelerated timeline (01:51). This dynamic feedback loop gamifies the setup process and powerfully communicates the value of personalization. The AI-powered meal logging (05:43) is another highlight, reducing the typical friction of calorie counting by allowing users to simply describe what they ate.
UX highlights
- Gamified Achievements: The app frequently rewards user actions with achievement badges for milestones like starting the first fast (03:10), logging water (04:05), and tracking a meal (05:58). This provides consistent positive reinforcement.
- Multi-Modal Input: For meal logging, users have three options: describing the meal with text (05:43), using an AI food scanner (06:22), or scanning a barcode (07:16). This flexibility accommodates various situations and user preferences.
- AI Coach: An integrated AI coach (07:42) offers answers to health-related questions with pre-set suggestions, making it easy for users to get information without typing.
- Clear Progress Visualization: The Progress tab (09:33) consolidates achievements, weight logs, and nutrition data with clean charts and graphs, giving users a comprehensive overview of their journey.
- Actionable Feedback: After logging a meal, the app provides a simple 'Nutrition Grade' (05:57), offering immediate, easy-to-understand feedback on their food choices.
- Interactive Timers: The fasting timer on the dashboard is clear and central, providing at-a-glance information on the current fast status (03:08).
Monetization & growth
Fastie presents a soft paywall after the comprehensive onboarding quiz (02:34). By this point, the user has invested significant time and received a personalized plan, increasing the likelihood of conversion. The paywall itself uses social proof, featuring a user testimonial and star rating. It offers two clear choices: a weekly subscription with a 3-day free trial and a one-time lifetime purchase option, catering to different user commitment levels.
Who it’s for
This app is primarily for individuals looking for a structured approach to weight loss through intermittent fasting. It's well-suited for users who are new to fasting and appreciate guidance and personalization. The AI features and gamified elements also appeal to tech-savvy users who want a smart, low-friction way to track their nutrition and stay motivated.
Notes & opportunities
The onboarding quiz is very long, which could be a point of drop-off for less motivated users, despite the reinforcement. The AI food scanner (06:32) and barcode scanner (07:15) both appear to fail in the recording, which could be a significant point of user frustration if common. The app could also benefit from integrating educational content more directly into the main experience, rather than relying solely on the AI coach.