Grindstep - Espresso Dial In

Every app says grind finer. Grindstep says how much - in your grinder's own steps, with the math shown, learned from your own shots. No account. Pay once.

It is 7 a.m. You pull a shot. It runs fast and tastes sour. Your app tells you what you already knew from one YouTube video: grind finer. It never tells you how much.

We built Grindstep to answer the real question. It learns how many seconds each step of YOUR grinder moves a shot - from your own consecutive shots - and hands back the adjustment in your grinder's own units with the math shown: your grinder moves about 2.5 s/step on this bean, so go 2.5 steps finer, 12 to 9.5. The engine is deterministic regression over your own shots; it shows the arithmetic it used, is honest about its confidence, and stays directional until it has learned enough of your grinder to be quantitative.

Grindstep is local-first: your shots live on your iPhone, there is no account, and you own it with a one-time purchase.

FREE, FOREVER

• Unlimited shot logging with a built-in timer, repeat-last-shot, and ghosted values - a full log in about ten seconds
• The directional recommendation layer (the taste-and-time decision matrix)
• 2 active bags, 1 grinder and 1 machine, per-bag recipes, basic stats
• All import and export: one-tap Beanconqueror import, CSV import, versioned JSON export/import, and CSV export - your shots stay yours

PRO - 14.99 USD once (Lifetime), or 4.99 USD/year with a 7-day free trial. There is no monthly plan.

• The quantitative Dial Engine - how much finer, in your grinder's own steps, with the math shown (12 to 9.5), not just "grind finer".
• First Shot Forecast - a new bag starts from your own locked history, source-labeled, so you stop sacrificing shots to find the neighborhood.
• Brew Control Chart - exact points with TDS, honest estimated regions without, plus per-bag dial-in trails.
• Roast-age drift - your dialed settings on an aging curve, with a week-ahead forecast; freezing a bag pauses its clock.
• Unlimited bags, grinders, and machines.
• Cost per shot and per bag, plus the dial-in-tax stat trending down as the engine learns you.
• A Home and Lock Screen widget for your active recipe, and a repeat-last-shot Action Button.
• A clean bag-journey share card for the coffee forums.
• Optional water and accessory fields for the deep obsessives (off by default).

WHAT GRINDSTEP IS NOT

• Not a filing cabinet - it computes what other logs only store.
• Not medical or health advice; taste guidance is preference calibration only.
• Estimated chart placements are always labeled estimated; exact placement needs a TDS reading and shows the standard formula (EY% = TDS x beverage mass / dose).

YOUR DATA Your shots live on your iPhone. There is no account, and nothing is uploaded to a server. Grindstep does not sync to a cloud - instead it gives you real export freedom: move your whole archive between devices with JSON export and import, or take it to any other app, whenever you want. Grindstep is designed exclusively for iPhone.

SUBSCRIPTION TERMS The annual subscription auto-renews until canceled. Renewal is charged within 24 hours before the period ends unless auto-renewal is turned off at least 24 hours prior. Payment is charged to your Apple ID. Manage or cancel in Settings > Apple ID > Subscriptions. The Lifetime purchase is a single charge with no recurring billing.

SUPPORT captainlongevity@gmail.com

Privacy Policy: https://app-legal-pages.vercel.app/grindstep/privacy Terms of Service: https://app-legal-pages.vercel.app/grindstep/terms