Design your program with any AI agent. Paste the JSON. Train. That's it.
$1.99/month · $7.99/year · No ads · Works offline
The flow
No exercise databases. No drag-and-drop builders. The workflow you already use, with a real home for it.
Tell any AI agent what you want. Push/pull/legs, hypertrophy block, 5-day aesthetic — whatever you train.
Open Stackd, hit Import New, and paste. Every workout, exercise, set and rep range — instant.
{
"program": "5 Day Aesthetic",
"days": [{
"name": "Chest & Tri",
"exercises": [...]
Stackd handles sets, reps, e1RM, overload alerts, and your nutrition — all in one place.
Ask any AI agent to build a workout program in JSON. Paste it into Stackd. Your entire program — every workout, exercise, and rep range — imports instantly.
{ "program": "5 Day Lean Bulk", "days": [ { "name": "Day 1 - Chest", "exercises": [ { "name": "DB Bench Press", "sets": 3, "reps": "6-8", "weight": 30.0 } ] } ] }
After every session, Stackd calculates your Estimated One-Rep Max with the Epley formula. A running chart of strength over time, per exercise.
NSCA's 2-for-2 rule: hit the top of your rep range for two sessions in a row, and Stackd tells you to add weight. No guesswork. No spreadsheet.
Log meals, track macros, follow a plan — inside the same app you train in. Nutrition and performance live together because they belong together.
Review session history and export your programs, nutrition, and full session log as CSV anytime.
Pricing
No ads. Cancel anytime.
Full access. Cancel anytime.
That's 67% off — under $0.67/month.
FAQ
JSON format, e1RM math, subscription, troubleshooting — all in one place.
Why Stackd exists
Stackd was built by a solo developer who got tired of designing programs and tracking them in a notes app. Stackd is that home.
$1.99/month or $7.99/year. No ads. Built for iPhone.