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Coffee tools for iPhone: grind targets in microns, translated to clicks for your grinder, a diagnostic engine that finds the one change to fix an off cup, guided recipes with timers, and a logbook that learns your taste.

mikron works in microns — an estimated particle size for your grinder — and converts to your grinder’s clicks or dial numbers. The target accounts for method, roast level, bean freshness, processing and water hardness, then your own rated brews pull it toward your personal sweet spot.

Add it yourself: search for it in any grinder picker and tap Add, or use Add a grinder… at the bottom of the list. Two routes, for two cases. If your grinder is stepped (numbered clicks or detents), Enter specs manually needs only its total number of clicks; mikron estimates the rest and marks the result approximate. If you already use a setting for a brew method, or your grinder is stepless (Niche Zero, Eureka Mignon, DF64, Lagom and most commercial grinders, where no universal chart can honestly cover it because every unit’s zero point drifts), Calibrate from settings I use builds a map of your dial from them, and every tool speaks your numbers from then on. Tell us about a stepped grinder we’re missing, too: we add one once its numbers can be sourced.

On your iPhone. No account, no tracking, no analytics. Your logbook never leaves your device except when you export or share it, add a brew-ready reminder to Apple Reminders, back up your iPhone, or turn on iCloud sync — and a complete backup of everything, as a single JSON file, is free at any time.

The core tools are free, and so is the full JSON backup of your data. A one-time mikron Pro unlock adds bulk import from other apps, per-entity CSV export, advanced stats, and the caps lifted on custom grinders, custom brew methods and per-bean memory. No subscription, no ads either way.

Yes. Everything is computed on your device, so it works in airplane mode.

Yes — mikron imports from Beanconqueror and from any CSV with a flexible column mapper. Your history carries over, and the learning loop picks it up from there. Bulk import is part of the one-time mikron Pro unlock.

Rated brews refine a per-bean sweet spot, and bean freshness shifts with days off roast. Every learned number shows why it moved — tap it — and personalization can be switched off entirely in Settings.

Email us (button above). Bug reports with the exact screen, what you expected, and what happened instead get fixed fastest.

Settings ▸ Data & privacy ▸ Danger Zone has three, in order of reach. Reset settings restores theme, layout and preferences to their defaults and keeps every brew, bean, recipe and custom grinder. Clear all data permanently deletes your brews, beans and custom recipes — it shows the exact counts before you confirm, and offers to export a backup first. Reset app does that and resets every setting, returning the app to a brand-new install. Since everything lives on your device, deleting the app deletes the local copy. If you turned on iCloud sync, remove the iCloud copy too — Settings ▸ [your name] ▸ iCloud ▸ Manage Account Storage.