Percolate
A drinker's coffee shelf and cupping log — built and run by one person.
Percolate is an iOS app for specialty coffee drinkers, built and run by one independent developer. It catalogs your shelf, logs every cup, and recommends bags you already own. It is not a roaster, not a scraper of competitor sites, and not an ad platform. Percolate is free; it makes money only from disclosed roaster affiliate links.
Percolate is built and operated by Bob Guillow, an independent developer and longtime specialty-coffee drinker, and published by Timberline Ventures LLC, the developer's own company. There is no outside investor and no advertising network behind the app. Decisions about features, privacy, and direction are made by one person, and that person answers the email at support@percolateapp.com.
Percolate is an iOS app for specialty coffee drinkers. It does four things well: catalog your shelf with status, origin, process, and roast; log every cup with a structured cupping note for aroma, acidity, body, and flavor; build a taste profile from your real shelf and the cups you brew; and suggest what to brew today from bags you already own. A yearly Year in Coffee recap closes the loop with the stats only your own data can produce.
Percolate is free to download and use — there is no subscription, no paywall, and no Pro tier. Every feature is included: building your shelf, logging cupping notes, scanning labels, the flavor quiz, and the Year in Coffee recap. There are no ads and we never sell your data.
The only revenue stream is transparent. Coffee detail pages may include “Buy from” links to the roaster or to specialty retailers. When you use one of those links and purchase, we may earn a small commission at no cost to you. This is disclosed on the page where the link appears and in the Terms of Service. The price you pay is the same.
The coffee internet has not been served well. The most-cited reference sites are dated, ad-heavy, and treat the drinker like a row in a database. Newer entrants are feature-thin and focused on discovery for shoppers, not on drinkers who already keep a half-dozen bags on the shelf and want to actually dial them in. Percolate is built for the drinker who needs a shelf, a cupping log, and a private taste profile in one place — without ads, without scraping, and without being pushed toward the next purchase.
Articles published on this site are written by Bob Guillow based on first-hand experience as a coffee drinker and on cited primary sources (roaster notes, the SCA cupping protocol, processing and roasting references, and other public sources). When a fact comes from somewhere other than direct experience, it is linked. When something is an opinion, it is labeled.
Articles are dated, and the date is updated only when the content actually changes — not just to make the page look fresh.
Press, partnership, or product feedback: support@percolateapp.com. There is no DM channel — email is the canonical contact.