01 Home
Today, experiment, trends
- Today card
- Active experiment
- Insight grid + tasks
Coffee geek experiment bench
Tweak the variable. Evolve the recipe.
Not a coffee guide. Not a check-in app. An experiment bench for people who tweak parameters — and want to know which change actually mattered.
A/B experimentsRecipe forkingBLE scale dataFlow rate curves
Real app surfaces
Inside the app
Five core tabs plus widgets cover the main workflow.
Workflow map
How the five tabs split responsibility
Home surfaces stats and experiments, Brewing handles BLE scales and A/B tests, Beans tracks inventory and freshness, Logs support retrieval and export, Settings holds devices, sync, and privacy.
01 · Home
Real tabToday stats, active experiment return, trends, insights, and task reminders.
02 · Brewing
Real tabBLE scale streaming, quick brew, guided sessions, espresso dial-in, recipe library, and A/B experiment setup.
03 · Beans
Real tabFull bean profiles, inventory tracking with auto-deduction, freshness countdown, and optional photos.
04 · Logs
Real tabSearch, filters, heatmap, sensory scores, and batch export to JSON/CSV/PDF/text.
Home → Brewing → Beans → Logs, with Settings holding the system layer
Five tabs, each with a clear job. Widgets and Dynamic Island extend the workflow outside the app.
02 Brewing
Live workspace and recipe actions
- Quick brew + BLE auto-dose
- Guided brew + A/B
- Espresso Dial-In
03 Beans
Inventory, freshness, profiles
- Auto-deduction on save
- Freshness tracking
- Low-stock alerts
04 Logs
Searchable records and heatmap
- Search + date filters
- Sensory radar scores
- Single or batch export
05 Settings
Devices, sync, privacy, widgets
- BLE management
- Optional sign-in + sync
- Privacy controls
The experiment loop
Built for people who run experiments
This app assumes you already know what you're doing. It systematizes your experiment workflow — it doesn't teach you how to brew.
Full data chain
Core capabilities from the experiment workflow: BLE data capture, controlled variable testing, recipe evolution, and full export portability.
Scale
BLE scale streaming with flow rate
Acaia, Timemore, and compatible scales. Weight + flow rate, live.
A/B
2–5 variant experiments on 6 variables
Temperature, grind, dose, water, ratio, time. Side-by-side comparison after each run.
Recipes
Every tweak gets a version number
Parent link, changelog, full history. Fork a recipe, evolve it, trace decisions back.
Espresso
Dial-in with extraction feedback
Dose/yield/time in, extraction assessment and adjustment suggestions out.
Guided
Immersive step-by-step brewing
Phase timing, live scale overlay, Dynamic Island on lock screen.
Export
JSON / CSV / PDF / text
Single or batch. No paywall. Your data, always portable.
Scale
BLE scale streaming with flow rate
Acaia, Timemore, and compatible scales. Weight + flow rate, live.
A/B
2–5 variant experiments on 6 variables
Temperature, grind, dose, water, ratio, time. Side-by-side comparison after each run.
Recipes
Every tweak gets a version number
Parent link, changelog, full history. Fork a recipe, evolve it, trace decisions back.
Espresso
Dial-in with extraction feedback
Dose/yield/time in, extraction assessment and adjustment suggestions out.
Guided
Immersive step-by-step brewing
Phase timing, live scale overlay, Dynamic Island on lock screen.
Export
JSON / CSV / PDF / text
Single or batch. No paywall. Your data, always portable.
FAQ
Common Questions
This public site only describes capabilities that are verified in the app and supporting documentation.
How do I add a brew record? +
Open the Log tab and tap the add button in the top-right corner. You can also save a brew directly after finishing Quick Brew or Guided Brew.
How do I run an A/B experiment? +
Start from the Brew tab, choose Experiment, then keep all variables the same except the one you want to compare. BrewTinker will save each round and show the results side by side.
How does cloud sync work? +
Data Sync uses a local-first model. Your brews stay available on device, and signed-in users can manually sync or enable auto-sync from Settings > Data Sync.
What devices can it connect to? +
The current supported device families are Acaia scales, Timemore scales, and Inkbird thermometers. Actual compatibility can still vary by model, firmware, and iOS environment.
What can I export? +
You can export individual brews as text, PDF, image, or JSON, and batch export brew history as CSV, JSON, or text. No subscription required.
How do I delete my account? +
Open Settings, tap your profile, scroll to the danger zone, and choose Delete Account. BrewTinker will ask for a recent sign-in before removing cloud and local data.
Ready to experiment
Run your next experiment.
BLE scale data in, versioned recipe out. Download, run one real session, and decide from actual workflow fit.
iPhone app5 languagesNo paywall
Get started
The product is the iPhone app
Download, connect your BLE scale, run one real A/B session, and decide from actual workflow fit.
Get started
Your data stays portable
JSON, CSV, PDF, plaintext export. Local-first storage. Cloud sync is optional, not required.
Get started
Privacy is a first-class control
Analytics opt-in, crash reporting opt-out, no paywall on exports. Read the privacy policy before you decide.
