CalculatoriOS / AndroidWeb
All-in-1 Converter Calculator
Every unit, currency, and conversion in one offline app — now on iOS, Android, and web.
All apps & tools
Every app focuses on doing one thing well. Filter to find what you need.
Business TooliOS / AndroidWeb
Bill Organizer and Tracker
Never miss a bill again — simple reminders and monthly overviews.
CalculatoriOS / AndroidWeb
Currency Converter Worldwide
Quick, reliable currency conversion for travelers and global businesses — now on iOS, Android, and web.
Business TooliOS / AndroidWeb
Instant Quote Maker Template
Create professional quotes and invoices in seconds.
Business TooliOS / Android
Mileage & Tax Expense Tracker
Track every deductible mile and expense for tax season — on iOS and Android.
GameiOS / AndroidWeb
Mind Skills Arcade
118 short brain games for memory, focus, logic and speed — offline on iPhone and Android, and on the web.
Business TooliOS / AndroidWeb
Monthly Income Booster
Practical ways to grow side income — on iOS, Android, and the web.
CalculatoriOS / AndroidWeb
Smart Roofing Calculator
120+ roofing calculators — plus deck, fence, drywall, insulation, tile, sod and gravel tools in v1.7.
ContentWeb
Bullpen Edge
Daily MLB win probabilities and projected scores, graded in public.
ContentWeb
GridironProjector NFL
Projected scores, margins, totals and win probability for every NFL game, graded in public.
ContentWeb
HoopVantage
NBA game projections, power ratings and advanced stats.
CalculatorWeb
Smart Roofing Calculator (Web)
Roofing estimates from any browser — no install required.
GameAndroidWeb
Prism Riot
The colour card game, rioted — 65 free modes in your browser and on Android, with the iPhone app in App Store review.
GameiOS / AndroidWeb
Just Like Games
Find games like the ones you love — iOS, Android and web.
Business ToolWeb
Monthly Income Booster (Web)
Web tools and ideas to grow extra monthly income.
Business ToolWeb
Express Biz Tools
Free inventory, invoicing and business calculators for small businesses.
Business ToolWeb
Instant Sheet Templates
Business templates and free generators that export a clean PDF.
Business ToolAndroidWeb
WebP Convert to JPG
Convert WebP images to JPG instantly — free and private.
CalculatorAndroidWeb
Smart Fencing Calculator
Estimate fence materials, posts, and cost in seconds — on Android or the web.
CalculatorWeb
Grams to Cup Converter
Quick kitchen conversions — grams, cups, ounces, tablespoons.
CalculatorAndroidWeb
Smart Decking Calculator
Estimate deck size, materials, and cost in seconds — on Android or the web.
CalculatorAndroid
Smart Drywall Calculator
Estimate drywall sheets, mud, tape, and screws in seconds — free on Android.
CalculatorAndroidWeb
Smart Insulation Calculator
R-value, batts, blown-in bags, spray foam & real cost data — free on Android and the web.
CalculatorAndroidWeb
Smart Tile Calculator
Tile quantity, grout, thinset, waste and cost — free on Android and the web.
CalculatorAndroid
Sod Calculator: Turf & Grass
Sod, topsoil, seed, fertilizer and artificial turf — 34 lawn calculators, free on Android and offline.
CalculatorAndroidWeb
Gravel & Stone Calculator
Tons, cubic yards and truckloads for any stone — 34 free gravel calculators on Android and the web.
GameiOS / AndroidWeb
Geography Quiz Arcade
122 geography games: flag quiz, world map quiz, capitals and the 50 states. Free on iPhone, Android and the web.
Business ToolWindows / Mac / AndroidWeb
SofaDeck
Turn your phone into a button deck and voice remote for your Windows PC or Mac — in any phone browser, or with the free Android app.
Business ToolAndroid
ScanKeys: Barcode Keyboard
An Android keyboard with a barcode scanner built in: scan a label and the code is typed into any app.
Business ToolBrowser extension
Pixel Porter for Chrome
Right-click any image in Chrome and save it as JPG, PNG or WebP.
Learn more
Edge Add-ons: coming soon
Business ToolWeb
Construction Calculator API
The roofing and construction formulas behind our calculator sites, as a JSON REST API.
CalculatorWeb
Simple Mortgage Planning
Free mortgage, affordability, refinance and PMI calculators that show the math.
ContentWeb
Screw Fitment Database
Find exactly what a small metric screw fits — from M1.2 to M6.
Business ToolWindows
PixFerry
Convert whole folders of iPhone HEIC, WebP and AVIF photos to JPG or PNG on your PC — offline, no codec add-ons.
Business ToolWindows
SheetCabinet
49 ready-made spreadsheet templates for Windows — budgets, bills, invoices and contractor estimators. Preview, then open in Excel.
Business ToolWindows
Estimate Template & Invoices for Windows
Estimates, quotes and invoices with your logo for Windows: PDF, payments and a dashboard. No subscription, no account.
GameWindows
Crazy Eights Offline Card Game for Windows
Classic Crazy Eights against 1–3 computer rivals on your PC: wild 8s, three difficulty levels, full keyboard play. Offline, no ads.
Learn more
Coming soon to the Microsoft Store
GameWindows
Mind Skills Arcade for Windows
More than 120 brain games on your PC — memory, logic, maths, speed and puzzles — with a daily puzzle and streaks. Offline, no ads.
GameWindows
Brain Break
A gentle 2-minute brain-game break every 30, 60 or 90 minutes, from your Windows notification area. Focus streaks, offline, no ads.
GameBrowser extension
Mind Skills Daily Puzzle Tab
A calm new tab page with one quick brain puzzle a day, your streak, a big clock and search. No ads, no account.
Learn more
Coming soon to the Chrome Web Store
For Shopify merchants
Shopify apps
Tierwise quantity breaks, Bulk Edit Everything and Shelfport collection import/export on the Shopify App Store, plus Spanwise, Cratebird, Gaugely and Quotewell coming soon.
See the Shopify apps →For your PC
Windows apps
PixFerry batch photo converter, SheetCabinet Excel templates, an estimate and invoice maker, Crazy Eights and brain games for Windows 10 and 11, on the Microsoft Store.
See the Windows apps →For Chrome and Edge
Browser extensions
Pixel Porter saves any image as JPG, PNG or WebP; Daily Puzzle Tab puts one quick brain puzzle on every new tab.
See the extensions →Guides to choosing an app
How these apps work
Most products here come as a pair: a free website you can use in any browser and a mobile app with the same tools for when you are on a job site, in a kitchen or away from a laptop. The calculators give the same answers in both, because they share the same formulas, and the websites show the working so you can check it.
The apps are free to download and supported by ads. Where an app offers an upgrade, it is a one-time purchase rather than a subscription.
Use the filters above to narrow the list to calculators, business tools, games or content sites, and open any card for the store links, the matching website and the privacy details for that app. Questions or a tool you would like us to build? Contact support.