Health and Wellness · Supplement routine tracking app
StackStack: a supplement routine tracking app for a wellness brand
We built StackStack for a wellness supplement brand so its customers can follow multi-product routines and see their progress. It took 6 weeks. Routine adherence reached 71% at ninety days, against a category norm nearer 20%, with 41,000 active users logging daily.
- Client
- Wellness Supplement Brand
- Industry
- Health and Wellness
- Built
- Mobile app
- Timeframe
- 6 weeks

What changed
- 71% adherenceto routines at ninety days, against a category norm nearer 20%
- 41,000 usersactive and tracking daily
- Under 15 secondsa day to log
- Within 3 daysof actual run-out for reorders, calculated from consumption
- 44% fewer contactsto customer support for questions the app answers directly
- 6 weeksfrom start to finished build
Results as reported for this build after launch.
The challenge
Customers had no structured way to track their routines or progress, which weakened long-term engagement and made the products seem less effective.
The brand's customers were taking four or five products on different schedules: some with food, some without, some twice a day. Most relied on a phone alarm and a rough memory of what they had already taken.
Missed doses were only part of the problem. Customers could not tell if a regimen was working, because they did not know how consistently they had followed it. Someone who took a product sixty percent of the time and felt nothing would decide it did not work, which may or may not have been fair.
Off-the-shelf habit trackers did not fit. They are designed for one daily behaviour and ask for too much input. A supplement routine has several items with different rules, and the brand had already tested that any app needing more than a few seconds a day gets dropped in week two.
What we built
We built a wellness tracking app where customers set up their supplement programs and monitor progress, which keeps them consistent and keeps them engaged with the brand.
Daily logging was deliberately reduced to one screen of taps, because every extra field lowers the chance a log happens.
Multi-product routine setup
Each product gets its own schedule, dose size, food requirement and cycling pattern, including products taken on and off in blocks.
One-screen daily logging
Logging is a single screen of taps, stripped back so it takes under 15 seconds a day.
Adherence next to how you feel
Adherence is calculated per product and overall, then shown beside self-reported markers so users see how consistency relates to how they feel.
Consumption-based reorders
Reorders are predicted from actual consumption rather than fixed subscription intervals.
Conflict warnings and clinician export
Interaction and timing conflicts across a stack are flagged, and users can export their regimen to take to a clinician.
Adaptive reminders
Reminders adjust to when a person actually logs, not when they said they would.
Screens and design system


The result
Seventy-one percent adherence at ninety days is the figure the brand uses commercially. Adherence decides whether a customer notices a result, and that decides whether they reorder.
The clinician export was added late and has become a differentiator. Customers who bring a documented regimen to a doctor have a different conversation from those describing it from memory.


