contempl8.studio · well-made apps, yours for keeps

Serious tools for serious hobbies.

Sourdough and the garden. A new baby and the morning coffee. The trail, the workshop, the hobby you can’t stop thinking about — each one gets a beautifully simple app that does its job and gets out of your way. Buy once, keep forever. No accounts, no subscriptions, nothing watching over your shoulder.

🔌

Works offline

No signal, no problem. Everything runs right on your phone — in the kitchen, the garden, or the middle of nowhere.

🙅

No subscriptions

Pay once and keep it forever. No monthly fees, no upsells, no “pro” paywall hiding the good parts.

🔒

Private by default

Your data never leaves your device. No account to make, nothing tracked, nothing sent anywhere.

💛

Made with care

Each one is hand-built for a real hobby, with the little touches only someone who actually does it would think of.

I SOURDOUGH · BAKING & FERMENTATION

Sourdough Studio

STARTER · BAKE · FERMENT
Sourdough Studio

Track your starters, log feedings, and analyze peak times. Plan bakes, store recipes, and monitor bulk ferments — all offline.

── FEATURES ──
  • · Starter log with peak tracking & analytics
  • · Bake journal with scoring & notes
  • · Hydration, ratio & bulk ferment calculators
  • · Time-to-peak dashboard with charts
II NEWBORN SLEEP · PATTERNS & FEEDS

Newborn Sleep Studio

SLEEP · FEEDS · YOUR BABY'S PATTERNS
Newborn Sleep Studio

Log sleep and feeds one-handed at 3am — wake up to charts of your baby's real patterns. Wake window finder, soothing scoreboard, and honest insights that only appear when the data backs them.

── FEATURES ──
  • · One-tap sleep timer & minute-level log
  • · Feed log with side, minutes & oz recall
  • · Wake window finder & day/night heatmap
  • · Soothing scoreboard — what works for YOUR baby
III GARDEN · PLANTS & HARVESTS

Garden Studio

PLANTS · JOURNAL · HARVESTS
Garden Studio

Build your plant library, log garden activity, and track harvests season by season. Companion planting guide included.

── FEATURES ──
  • · Plant library with growth tracking
  • · Garden journal with activity insights
  • · Harvest log & water tracker
  • · Companion planting reference guide
IV COFFEE · POUR-OVER & BEANS

Coffee Studio

POUR-OVER · BREW · BEANS
Coffee Studio

Log every brew, dial in your grind and ratio, and build a bean inventory. Track tasting notes and save your best recipes for repeat perfection.

── FEATURES ──
  • · Brew log with grind, ratio & temp tracking
  • · Recipe library & tasting journal
  • · Bean inventory with origin & roast notes
  • · Brew calculator for any method
V TOY TRACKER · PLAY & ROTATION

Toy Tracker Studio

TOYS · ROTATION · PARENTS
Toy Tracker Studio

Log play sessions, track toy engagement, and rotate with confidence. Age-out alerts flag toys automatically — so you know what to keep, store, or donate.

── FEATURES ──
  • · Toy catalog with age range & storage location
  • · Play log with engagement rating per session
  • · Age-out alerts & rotation countdown
  • · Developmental age guide & setup checklist
VI DRINK RECIPES · COCKTAILS & BAR

Drink Recipes Studio

COCKTAILS · RECIPES · BAR
Drink Recipes Studio

Build your personal cocktail library, track what you've poured, and manage your home bar inventory. Super juice calculator and bar checklist included.

── FEATURES ──
  • · Recipe library with ingredient scaling
  • · Drinks made log & tasting notes
  • · Bar inventory & low-stock alerts
  • · Super juice & citrus calculators
VII BREWING · BATCHES & FERMENTATION

Brewing Studio

BATCHES · GRAVITY · RECIPES
Brewing Studio

Log every batch, track gravity readings, and store your best recipes. ABV and priming sugar calculators built in — so your best batch is always repeatable.

── FEATURES ──
  • · Batch log with gravity & fermentation tracking
  • · Recipe vault with ingredient scaling
  • · ABV & priming sugar calculator
  • · Ingredient inventory & tasting notes
VIII KEYBOARDS · BUILDS & SWITCHES

Keyboards Studio

BUILDS · SWITCHES · KEYCAPS
Keyboards Studio

Track every build, log your switch collection, and manage group buys in one place. Sound test journal and troubleshooter keep your setups documented and dialed in.

── FEATURES ──
  • · Build tracker with switch & keycap inventory
  • · Group buy log & shipment tracking
  • · Sound test journal & lube notes
  • · Troubleshooter & build checklist
IX FOUNTAIN PEN · COLLECTION & INKS

Fountain Pen Studio

PENS · INKS · NIB WORKSHOP
Fountain Pen Studio

Track every pen, log every ink, and know exactly what's loaded and when it needs flushing. 15 expert inks pre-loaded. Nib workshop included for tuning and maintenance logs.

── FEATURES ──
  • · Pen collection with nib & ink tracking
  • · Ink inventory with 15 expert inks pre-loaded
  • · Nib workshop & maintenance log
  • · Wishlist & writing session journal
X WORM FARM · BINS & CASTINGS

Worm Farm Studio

FEEDS · READINGS · BLACK GOLD
Worm Farm Studio

Stop guessing why your worms are unhappy. Log a feed one-handed at the bin and the app flags overfeeding before it crashes the bin, forecasts when your castings are ready to sift, and tells you what changed the week things went sour.

── FEATURES ──
  • · Bin journal — feeds, bedding, moisture/pH/temp
  • · Overfeeding guard — the #1 cause of die-offs
  • · Per-bin castings harvest forecast
  • · Bin Doctor — 16 problems, symptom to fix
XI RECIPE COST · PRICING & MARGINS

Recipe Cost & Pricing Studio

COST · PRICE · STOP UNDERCHARGING
Recipe Cost & Pricing Studio

Stop guessing what to charge. Cost a product once from a shared ingredient inventory — then when butter or wax goes up, edit that one price and every product recosts itself, flagging which ones just fell below target margin.

── FEATURES ──
  • · Ingredient inventory — edit one price, all recost
  • · Cost builder — packaging, labor, overhead
  • · Pricing engine — margin vs markup, fees
  • · Break-even & income-goal calculators
XII INVOICES · CLIENTS & PAYMENTS

Invoice & Payment Tracker Studio

WHO OWES · WHAT · BY WHEN
Invoice & Payment Tracker Studio

Know exactly who owes you what — and chase it without the awkwardness. Track client invoices and full or partial payments with automatic status, a 0–30/31–60/61–90/90+ aging report, a due-date calendar, printable invoices, and tiered copy-paste reminders. Offline, no subscription.

── FEATURES ──
  • · Client database — see who owes you the most
  • · Full & partial payments with auto status & aging
  • · Income summary + due-date calendar
  • · Printable invoices & tiered chase reminders
XIII CROCHET · YARN & PROJECTS

Crochet Studio

STASH · COUNTER · PROJECTS
Crochet Studio

Keep your whole craft in one place. Log every project, track your yarn stash so you stop buying duplicate skeins, count rows without losing your place, and troubleshoot tension and gauge when a piece goes wonky — all offline.

── FEATURES ──
  • · Project log — hooks, yarn used, photos
  • · Yarn stash — fiber, weight, dye lot
  • · Row counter & gauge/yardage calculator
  • · Crochet Doctor — tension & gauge fixes
XIV FITNESS · WORKOUTS & PROGRESS

Fitness Studio

LOG · CHART · PROGRESS
Fitness Studio

Stop training on vibes. Log every set, watch your lifts trend on real charts, follow a structured program, and know your one-rep max — all offline, no subscription.

── FEATURES ──
  • · Workout log — sets, reps, weight
  • · Progress charts per lift + body metrics
  • · Exercise library & structured programs
  • · One-rep-max calculator & rest timer
XV TRAVEL · ITINERARY & PACKING

Travel Studio

PLAN · PACK · GO
Travel Studio

Keep a whole trip in one offline file — itinerary, packing list, budget, and journal — instead of a dozen apps and a panicked search for a confirmation email.

── FEATURES ──
  • · Day-by-day itinerary builder
  • · Smart packing checklist
  • · Trip budget tracker
  • · Travel journal & guide
XVI GPS · COMPASS & FIELD MARKERS

Artifact Tracker Studio

MARK IT ONCE · WALK BACK ANYTIME
Artifact Tracker Studio

Mark it once. Walk back to it anytime. An offline GPS field-marker, high-tech compass tracker, and self-drawn map — drop a pin on trail cams, shutoff valves, property corners, ATVs, sprinkler heads, or geocaches, then let the compass walk you straight back. No signal required, no subscription.

── FEATURES ──
  • · Offline GPS markers — pins that survive no-signal
  • · High-tech compass — walk back to any mark
  • · Self-drawn map & custom zones
  • · Export to GPX/KML
XVII HOURS · RETAINERS & BILLING

Freelance Time & Retainer Tracker Studio

EVERY BILLABLE HOUR · CAPTURED
Freelance Time & Retainer Tracker Studio

Never lose a billable hour — or blow a retainer — again. A one-tap start/stop timer, billable vs non-billable entries per client, retainer burn-down that turns amber then red, and a Ready-to-Bill summary that hands straight off to Invoice Tracker. Offline, no account, no subscription.

── FEATURES ──
  • · One-tap start/stop timer — resumes if left running
  • · Retainer burn-down — "14 of 20 hrs used"
  • · Ready-to-Bill summary grouped by client
  • · Offline — one file you own, not a monthly seat
XVIII ORDERS · DEPOSITS & SCHEDULE

Bake Orders Studio

NEVER A STICKY NOTE AGAIN
Bake Orders Studio

Every custom order, deposit, and pickup — never a sticky note again. An orders board with deposit and balance per order, a weekly bake schedule so you see what is booked before you say yes, a "due this weekend" dashboard with overdue-pickup alerts, and a customer list. Offline, no subscription.

── FEATURES ──
  • · Orders board with deposit & balance per order
  • · Weekly bake schedule — see what is booked
  • · "Due this weekend" + overdue-pickup alerts
  • · Customer list with one-tap new order
XIX COLLECTION · WEAR & SERVICE

Watch Tracker Studio

EVERY WATCH · EVERY WRIST DAY
Watch Tracker Studio

Every watch, every service date, every wrist day — one place, offline. A master collection inventory with specs, serial, and value, a wear-rotation log that spots the orphan you never wear, self-surfacing service-due reminders per movement, and insurance-ready CSV export. No account, no cloud.

── FEATURES ──
  • · Master collection — specs, serial & value
  • · Wear-rotation log that spots the orphan
  • · Service-due reminders per movement
  • · Insurance-ready CSV export
XXI CHARACTERS · QUESTS & COMBAT

Campaign Tracker Studio

YOUR WHOLE TABLE · NO SUBSCRIPTION
Campaign Tracker Studio

Your whole tabletop RPG campaign, in your pocket. Character sheets, session recaps, quest log, NPC & faction tracker, loot & inventory, and a real digital initiative tracker — works for D&D 5e, Pathfinder, or any system. Offline, no account, buy once and keep it forever.

── FEATURES ──
  • · Character roster with level, HP, AC at a glance
  • · Session log that recaps before details fade
  • · NPC & faction tracker with 15 ready-made archetypes
  • · Digital initiative tracker for combat
XXII STACK · PREMIUM & INSURANCE

Bullion Studio

YOUR VAULT · NOBODY’S CLOUD
Bullion Studio

Every bar, round, and coin — logged, weighed, and valued at today’s spot. Track premium over spot and cost basis, watch your stack tilt the assay balance, and print a photo-backed insurance schedule. 100% offline, no account, no cloud — your holdings never leave your device.

── FEATURES ──
  • · Live portfolio at spot — fine oz, value, profit & loss
  • · Premium over spot on every purchase
  • · Junk-silver melt & break-even calculators
  • · One-tap printable insurance schedule
XXIII INTENTIONS · REAL MOON & CONSTELLATIONS

The Lunation

PLANT AN INTENTION · WATCH IT RISE
The Lunation

A moon journal that actually grows. Plant an intention — a few words — and it becomes a flower under tonight’s real moon. Water it with a one-line reflection; at the full moon, harvest your intentions into a constellation you name and keep. No streaks, nothing dies if you miss a day — it can never tell you that you failed. Offline after install, no account, no subscription.

── FEATURES ──
  • · Plant intentions as flowers under the real moon
  • · No streaks — nothing dies if you miss a day
  • · Harvest a constellation you name & keep
  • · True astronomy, real celestial events, offline
XXIV YARD MAP · BEST LINE & MOW LOG

Mow Planner Studio

YOUR YARD’S GEOMETRY · NOT A GUESS
Mow Planner Studio

Map your actual lawn — trees, playset, fire pit and all — and get the best stripe angle for your deck width, honest mow-time estimates computed from real geometry, and rut-preventing pattern rotation. Trace over satellite at geojson.io and import, or walk the boundary with GPS. Offline, no account, buy once.

── FEATURES ──
  • · Stripe-angle sweep with obstacle-aware pass clipping
  • · Time estimates from passes + turns, not acreage charts
  • · Rut alarm after 3 cuts on the same line
  • · Mow log with estimated-vs-actual calibration

The Community Board

Owners pin the recipes and builds they're proud of — made, rated, and refined in their own tool first. Browse the boards free, cheers the good ones, and try any card in a live demo.

Find the one for your thing.

Every tool has a free, full demo — no sign-up required. Try it, and if it earns a place in your day, it’s a few dollars on Etsy to keep forever.

Explore the tools ↓ Visit the shop ↗

Questions & answers

Are contempl8.studio tools free?

Every tool has a free live demo you can use in your browser. The full personalized version is a one-time purchase on Etsy — there is no subscription.

Do the tools work offline?

Yes. Each tool is a single self-contained HTML file (a PWA) that runs locally in your browser and keeps working offline after the first load.

Do I need an account?

No. There are no accounts and no servers — your data stays in your browser, on your device.

Do I own the tool, or is it a subscription?

You own it. Tools are a one-time purchase with no monthly fees, and the file is yours to keep forever.

What does "personalized" mean?

When you buy on Etsy you receive a copy with your name baked in, licensed to you.