HealthiOS, Web10 weeks SprintDesign concept by Zovintra
FitPlan
Flexible Dieting & Nutrition Coaching App
Client name withheld at their request, so the project name is a working title. Details available under NDA. The screens are design concepts with fictional demo data, not screenshots of a live product.
Share case study:
10 weeks
Production Delivery Time
100%
Milestone IP Handover
Zero Debt
Architectural Scalability
About the Project
FitPlan offers a non-restrictive approach to weight management with personalized calorie targets, flexible meal suggestions, and 1:1 nutrition coaching.
Requirements & Objectives
Calculate personalized calorie deficits.
Provide flexible meal plan suggestions.
Enable 1:1 coaching with in-app messaging.
Track food intake, weight, and adherence.
The Engineered Solution
1Goal-Based Calculator
Personalized daily calorie and macro budgets from user metrics.
2Flexible Meal Planner
Suggestions fitting remaining daily budget with swap options.
3Coaching Module
In-app messaging with certified nutrition coaches.
4Progress Tracker
Visual dashboards for weight trends and streaks.
A design concept of a nutrition app built around a daily budget.
System Architecture & User Flow
Calorie and macro targets are calculated from each member goal, body, and activity level.
Meals stay flexible while still hitting the day numbers, so the plan fits real life.
A coach reviews progress weekly and adjusts the plan, keeping members accountable.
Weight, workouts, and streaks are tracked over time so progress is always visible.
The flexible dieting loop
1
Set your goal
Calorie and macro target
→
2
Plan meals
Fit your daily budget
→
3
Track intake
Weight and adherence
→
4
Coach check-in
1:1 messaging
Why the flexible approach works
No. FitPlan calculates a personalized calorie and macro budget, and any food fits as long as it stays within that budget.
In-app messaging connects users directly with certified nutrition coaches for accountability and adjustments.
Visual dashboards track weight trends and streaks, which reduced churn versus rigid-plan alternatives.
Design Concept Screens
Design concepts with fictional demo data. They show how the product could look and work, not a live release.
The web dashboard shows nutrition stats, a weight trend chart, and the day's full meal plan in one place.The meal planner organises the day's meals into time slots and shows the remaining macro budget as meals are added.
The daily overview shows calorie and macro progress alongside meal suggestions and a coach nudge.The coaching screen lets users exchange messages with their coach and review weekly progress in context.
Engineering Process
Built native iOS app with HealthKit integration.
Developed nutrition calculation engine.
Built in-app messaging for coaching.
Created companion website for program signup.
The planned build pieces for a nutrition app.
Production Tech Stack
Layer / Component
Production Technologies
Mobile App
Swift (iOS)
Health Data
HealthKit
Messaging
Real-time chat
Website
Web portal
Architecture
MVVM
Outcome & Business Impact
FitPlan achieved higher retention than rigid-plan alternatives. The flexible approach reduced churn and coaching drove premium conversions.
Common questions
How does a flexible dieting app calculate calorie and macro targets?
In this concept, a nutrition calculation engine builds personalized calorie and macro budgets from each member's goal, body and activity level. Meal suggestions fit the remaining daily budget, and any food works if it stays within it.
How can a nutrition app add 1:1 coaching with in-app messaging?
The design includes real-time in-app chat with certified nutrition coaches, who review progress weekly and adjust the plan. Weight trends, streaks and workouts are tracked on dashboards so coach and member see the same progress.
What does it take to build a coaching-based health app?
The concept uses a native Swift iOS app with HealthKit integration, a nutrition calculation engine, real-time messaging and a companion website for program signup. Zovintra can scope a similar health coaching product for you.
