LESS GUESSWORK. MORE PROGRESS.
Your supplement stack, coached.
Stack Theory app builds your daily supplement routine around your training, tells you when to take what, and flags what doesn’t mix.
Launching on iOS in early 2027. Get notified when we go live. We’ll only use your email for launch news. See our privacy policy.
STACK THEORY
REST DAY
Morning.
Let’s close your stack.
1 left. Next: Magnesium · Before bed · Rest day
YOUR STACK
2/3 DONE
Vitamin D3 2000 IU
With lunch
Omega-3 1 g
With lunch
Magnesium 400 mg
Before bed
Current streak
7 days
7-day streak
Keep it going today.
Next up: Magnesium
Before bed · 400 mg
Ask your coach
“When should I take creatine?”
BUILT FOR THE WORK YOU PUT IN
Your routine. With a game plan.
Close your stack
Log your daily supplements in one tap and watch your ring fill. Build the streak.
CONSISTENCY IS THE GOAL
Know what doesn’t mix
Spot overlaps and absorption conflicts, like a multivitamin doubling up on vitamin D.
Vitamin D overlap detected
Check D3 + your multivitamin.
Ask your coach
An AI coach that knows your goals and your actual stack, not generic advice.
“When should I take creatine?”
Let’s fit it around your training.
PATTERNS & PROMPTS
RULE-BASED
Stack insights
Relevant checks based on your stack and saved logs.
Overlap · Vitamin D
Your multivitamin and Vitamin D3 both contain vitamin D. Check your total daily amount.
Timing tip · With a meal
Take Vitamin D3 and Omega-3 with a meal that contains fat.
Timing tip · Evening routine
Take magnesium in the evening or before bed, as part of a consistent routine.
7-day streak
Complete today’s stack to make it 8.
Ask your coach about your stack
Local rules only. These checks are not exhaustive. Guidance only, not medical advice.
STACK INSIGHTS · APP PREVIEW
CHECKS THAT RUN IN THE BACKGROUND
Catch what doesn’t mix.
Stack Theory checks your stack against simple, transparent rules. It flags overlaps, like vitamin D in both your multivitamin and your D3, and tells you the best time of day for each supplement.
Overlaps and doubling up, flagged as you build your stack
Timing tips that fit around meals and training
Evening reminders for the end of your routine
FROM GUESSWORK TO A DAILY HABIT
A smarter stack starts here.
01
Pick your goals
Strength, endurance, recovery. Start with what you’re working towards.
02
Build your stack
Add what you take. Get a routine that works around your training.
03
Log daily and get smarter tips
Stay consistent. Let your coach connect the dots.
Free to track.
Premium from £6.99/month for the AI coach and smart insights.
YOUR NEXT REP STARTS HERE
A little more intention. A lot less guesswork.
Early 2027 · iOS · No spam. Just your launch invite. We’ll only use your email for launch news. See our privacy policy.