Hoparoma calculates the hop, yeast, and malt aroma compounds in your recipe — grounded in published research — and derives your IPA's aroma and character, down to its tropical thiols, before you brew.
NEW IN 2.0 · On-device AI · Flavor Forecast + co-pilot
AI features need iOS 26 on a supported iPhone.
From your hops, malt, and yeast, Hoparoma computes the aroma-compound levels your recipe will produce — then plots the finished profile across seven sensory axes. A research-based read on how it will turn out, before brew day.
Most brewing apps tell you what hops to use. Hoparoma computes what your recipe is likely to smell like before you brew it, by combining four ingredient layers into one science-honest forecast.
23 strains · β-lyase activity rated
Cosmic Punch, Helio Gazer, Hornindal Kveik, A04 Barbarian (Conan), Lutra, LalBrew New England. Each strain carries a thiol biotransformation activity score (0–1.0) that gates how much hop and malt thiol gets released.
51 varieties · free thiol potential rated
Galaxy 0.90, Nelson Sauvin 0.90, Citra 0.75, Mosaic 0.60, Cascade 0.25. Free thiol scoring based on internal medians from Yakima Chief, Hop Products Australia, and brewer community data.
41 entries · thiol precursor level rated
Hoparoma models malt's thiol contribution — the layer most apps leave out. Pale 2-row holds up to ~700 µg/kg of bound 3MH precursor. Roasted malts are thermally degraded; wheat, oat, and rye carry low non-barley precursor.
Phantasm Powder · Propper Phantasm · future products
Additive amplification of the core 3 axes, normalized to dose per batch volume. Future-proof naming for upcoming booster products such as Tropics Boost and Apex Amplify.
Built on peer-reviewed research from MDPI Fermentation (2022), Springer EFR&T (2022), DIAL UCL (2023), and PMC 9329171 (2024). Brewfather and BeerSmith model hop chemistry; Hoparoma integrates yeast × hop × malt × adjunct into a single thiol expression engine — including malt thiol precursor data most apps leave out.
2.0 adds on-device AI, powered by Apple Intelligence. It reads the same 4-axis forecast and turns it into a tasting note you can actually read — then helps you steer the recipe toward the beer you're after.
Flavor Forecast
Apple Intelligence turns your predicted profile into a short, plain-language tasting note — the headline aroma, what sits underneath, and the finish. Generated entirely on device.
Pillowy passionfruit over soft citrus
Galaxy and Citra push tropical thiols to the front, while a β-lyase yeast keeps the haze juicy rather than sharp.
AI co-pilot
Say "more tropical, but not too bitter." The co-pilot reads your current build and proposes options — but every number comes from Hoparoma's prediction engine, not the language model. Each option shows a before/after radar and an honest trade-off.
Flavor Forecast and the AI co-pilot run on Apple Intelligence and need iOS 26 on a supported iPhone. On other devices Hoparoma tells you plainly — and the full 4-axis forecast still works everywhere.
Designed with the Thiol Forecast in mind. Low ABV, full thiol expression.
Thiol Forecast: 0.76 · high
Low-ABV hazy that doesn't sacrifice tropical aroma. Phantasm slider tunes intensity from 0.5 to 2.5 g/L.
Thiol Forecast: 0.74 · high
Sub-4% pale ale built around thiol-rich Southern Hemisphere hops and a thiol-positive yeast strain.
Every hop, yeast, and malt is rated for its thiol contribution — the data layer the forecast is built on.
51 varieties · 15 with lot-level crop year data
Free thiol potential scored for every variety. Hoparoma includes lot-level crop year data for 15 core varieties — each carries real 2024, 2025, and 2026 analytical lots (alpha acid, total oil, oil composition) you can switch between, so the radar reflects the exact crop you brewed with. Other varieties fall back to 4-year aggregate medians.
23 strains
Every yeast rated for thiol biotransformation activity. Availability badges tell you what you can actually source — from homebrew packs to pro-pitch-only strains.
41 entries
Models malt's thiol contribution — the layer most apps leave out. Brewfather and BeerSmith do not capture malt thiol precursor metadata. Hoparoma does — Pale 2-row holds up to ~700 µg/kg of bound 3MH precursor, while roasted malts are thermally degraded to near zero.
Built natively in SwiftUI for iPhone and iPad — with Apple's latest design language and a strict on-device privacy model.
100% native — no web views, no cross-platform wrapper.
Apple's Liquid Glass refraction, with a clean fallback to iOS 17.
One universal app. The radar and builder reflow for the larger screen.
All on device. No account, no sign-in, no tracking.
Modern IPAs amaze me every time I drink one — passion fruit and citrus, pillowy, full of surprise. But when I tried to brew like them myself, I never got close.
Hoparoma started in Tokyo with the hunch that real scientific analysis might finally close the gap. The radar chart visualizes your beer's character at a glance, and underneath, years of peer-reviewed research drive every calculation. Aroma compounds are quantified, not guessed.
Save a recipe, log how it actually brewed, refine it again. Over time you build a beer that's truly your own — guided by chemistry, not guesswork.
Transparent, indie pricing. Use Hoparoma free with up to 2 saved recipes — or unlock the full 4-axis engine.
Core Thiol Forecast, basic recipe management, up to 2 saved recipes, and 5 AI co-pilot sessions to try.
Unlimited recipes, unlimited AI co-pilot, 4-axis advice, history compare.
Best value for ongoing brewers · 7-day free trial.
Own Hoparoma forever. Support indie development.
Peer-reviewed research from MDPI Fermentation (2022), Springer EFR&T (2022), DIAL UCL (2023), and PMC 9329171 (2024) establishes that barley malt holds up to 700 µg/kg of bound 3MH precursor, hops carry both free and bound thiols, and yeast's β-lyase enzyme is the gate that unlocks all of them.
Both. The yeast and malt libraries include mainstream homebrew packs and pro-pitch-only strains for commercial breweries. Availability badges make it clear what you can source at your scale.
Hoparoma includes lot-level crop year data for 15 core hop varieties. Each carries real 2024, 2025, and 2026 analytical lots — switching crop year updates alpha acid, total oil, and oil composition, and the forecast on the radar chart follows. Varieties without lot data use 4-year aggregate medians.
The Suggestion engine surfaces in the Bento card after you compose a recipe. It analyzes your 4-axis thiol forecast and proposes 2–4 category-diverse next-batch tweaks — for example, "swap Citra for Galaxy to boost free thiol" or "Phantasm 1.0 → 1.5 g/L to amplify." Top 1 suggestion per category, so hops don't crowd out yeast, malt, or booster ideas.
Flavor Forecast and the AI co-pilot run on Apple Intelligence, which needs iOS 26 on a supported iPhone. Where it isn't available, Hoparoma says so plainly instead of hiding the button — and the full 4-axis Thiol Forecast, libraries, and tasting log work on every supported device, AI or not.
I'm building Hoparoma in the open. Occasional notes on hop aroma chemistry, what I get wrong and fix, and a heads-up when a new version ships. No spam, unsubscribe anytime.
