Mobile appUX / UIHealth & fitness

FitLog — calorie tracking simple enough that people actually stick with it

A nutrition app I took from research to a polished interface, built around one finding: people don’t give up on tracking — the apps wear them out first.

Role
UX / UI — full process
Scope
Research → hi-fi + UI Kit
Type
Mobile app · Nutrition
Year
2025
FitLog — key high-fidelity screens
The problem

Most tracking apps are abandoned within a week

People who want to eat better rarely lack motivation — they lack an app that respects their time. The popular ones are packed with features, ads, and generic advice, so logging a meal turns into a chore. After a few days, most people simply stop.

FitLog had one job: make daily tracking clear and fast enough to survive a real, busy week — without dumbing it down for people who care about accurate macros.

Maria
Maria
25 · Marketer · New York, USA
Wants

To stay in shape and keep a work–life balance. Lives on apps and gadgets, and needs calorie logging to be quick and effortless.

Frustrations

Worries about gaining weight from a desk job, and rarely finds time for sport.

Chooses by

Ease of use, genuinely useful features, integrations, and recommendations from friends.

Kate
Kate
42 · Teacher · Madrid, Spain
Wants

To hold a healthy weight, set an example for her two kids, and try new recipes without blowing past her daily calories. Loves science-backed nutrition reads.

Frustrations

Work stress triggers eating slip-ups. Past apps lacked the motivation and content to keep her coming back.

Chooses by

A simple interface, reviews from friends and colleagues, and subscription price.

Alex
Alex
32 · Lawyer · London, UK
Wants

To stay fit and be a role model for his family. Trains with a coach and wants to keep a calorie deficit, but a packed schedule makes regular meals hard.

Frustrations

Low energy and the fear of missing fitness goals. A clunky app would quickly kill his motivation to log.

Chooses by

Ratings and reviews, functionality, ease of use, and wearable integration (Apple Watch).

What the research told me

Big databases, exhausting experiences

I looked at seven of the most-used nutrition apps and kept hearing the same complaints behind their high ratings: cluttered screens, endless ads, and advice too generic to act on. The data was there — the experience was the problem.

Three personas kept that focus honest: someone who wants quick logging without the overwhelm, someone who needs gentle reminders to stay consistent, and someone fitting tracking into an already-packed day. Different lives, one shared need — get in, log it, get out.

What I designed

A few decisions that keep the habit alive

Each decision came back to one question: does this make tracking faster, or just busier? The ones below are the changes that take the most friction out of a daily log.

One-tap recurring meals

People eat the same breakfast most days. Logging it again shouldn’t take a search — a tap re-adds yesterday’s meal, so the routine survives a rushed morning.

Goals you can read at a glance

Clear visual indicators show how close you are to your calorie and macro targets, so progress is obvious without doing math in your head.

Trends, not just today

Weekly and monthly summaries turn scattered entries into a sense of direction — a reason to open the app beyond logging a single meal.

Less on screen, more clarity

Nutrition data is simplified to what matters in the moment, stripping the clutter that makes competing apps feel like spreadsheets.

How I knew it worked

Tested with real people before calling it done

I ran five moderated usability sessions on the prototype. The core flows held up — people logged meals without instructions — and three clear fixes came out of watching them struggle. Each one shaped the final design:

People struggled withRe-logging the meals they eat every day
So I addedShortcuts for recurring meals
People struggled withKnowing if they were on track for the day
So I addedClearer indicators for nutrition goals
People struggled withSeeing progress beyond a single day
So I addedWeekly and monthly trend views
Where it stands

Designed on evidence, not assumptions

FitLog went from a vague “tracking is annoying” to a finished product design — competitive research, three personas, usability testing, and high-fidelity screens with a consistent UI Kit behind it.

What I’m taking from it
FitLog — final solution, key screens
“ Good design isn’t about more features — it’s about solving a real problem and making the everyday effortless. ”
On the thinking behind FitLog

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