Training and nutrition built on evidence, with a quiet rhythm of faith if you want it. Use everything free for seven days, no account and no card. After that, one payment, and it's yours.
Invite only for now, and built in the open.
Every serious training app rents itself by the month, ties your data to an account, and asks you to trust numbers it never shows you. Aretia is the opposite, on all four counts.
Every number traces to a published study. If I cannot back a claim, it does not ship.
Training and nutrition in one place, both held to the same standard of proof.
A daily rhythm of faith sits at the heart, and switches off cleanly if it is not for you.
Seven days free with nothing to sign. Then one payment, offline, and it is yours.
One deterministic engine, no AI. It reads any training week against the same metrics, whether you brought the split or it wrote it for you.
Add each day's exercises, however you write them. Slang and abbreviations resolve to the real movement.
Weekly sets and frequency for every muscle, with indirect work counted as half a set.
Each muscle against the volume and frequency the research supports, then the fixes, worst first.
An illustrative read. Yours is scored from your own week.
Tell it your days, goal, experience and equipment. It writes a split that lands every muscle in the productive range, then lets you swap any lift for one you prefer.
An illustrative day. Yours is generated from your profile.
Aretia is a calculator, not an opinion. If I cannot back a number with research I have read and checked against its source, it does not ship. Here is what the engine measures, and where each rule comes from.
Every study read and checked against its source. Read the full list, and it ships inside the app.
Your calorie and macro targets come from a published formula, not a guess. Mifflin-St Jeor sets the baseline, then the research sets your protein and your rate of change.
Your food comes from the USDA database, where every value is sourced rather than typed in by strangers. It is a clean, sourced whole-foods library, with quick entry for everything else. Correct beats exhaustive and wrong.
Runs offline, in kilojoules or calories, like the rest of the app.
“My faith has not always been steady, but I am working on it, and having something that reminds me to be grateful helps. I believe training and God go hand in hand. He gave us these bodies, and the ability to shape them into something we can be proud of, no matter where we are in our training. For me it goes past training. The gym has always been where I clear my head, and faith does the same kind of work. When I trust God and take care of myself, I feel like the best version of myself, and that version keeps improving. I am building Aretia to help other people find that too.”
— Blake, maker of Aretia
Faith is on by default. You can turn it off in settings, and everything else still works.
I'm Blake, a junior application engineer. Direction and accountability have always been my hardest problems. I lose motivation easily, and the next step has rarely come easy to me. The only two things that ever pulled me forward were my faith and the gym, so I built Aretia around both. The faith side is on by default and easy to switch off. Either way you pay once, and it's yours.
If that sounds like you, leave your email below. I will only write when there is something real to share.