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Scientific and Graphing Calculator
Evaluate scientific expressions and plot functions over your chosen range.
CalculatorsOpen toolScreen PPI & Size Calculator
Work out pixels per inch, screen width and height, aspect ratio and the distance where pixels blend, for any phone, laptop, monitor or TV.
ElectronicsOpen toolScreen Resolution Checker
Read screen, viewport, scaling and colour capability signals.
Screen Testing & ColorOpen toolScreen Tearing Test
Observe moving stripes and checkerboards for discontinuities.
Screen Testing & ColorOpen toolScreenshot Beautifier
Put a screenshot on a colourful background with rounded corners, a shadow and an app or browser frame.
Image toolsOpen toolSecret Word Imposter Guessing Game
Pass the device for private roles, discuss a hidden word and cast secret votes across friendly group rounds.
Party & family gamesPlay gameSecure Password Generator
Generate local passwords with cryptographic randomness, configurable character rules and explicit copy or plain-text export.
GeneratorsOpen toolSend-and-Cash-Out Total Fee Worksheet
See what you pay in total when you send money, and how much cash the other person has after withdrawing it.
Mobile money & telecom tariffsOpen toolSEO Title and Meta Description Preview
Preview page titles and descriptions in desktop and mobile search layouts.
QR & linksOpen toolSHA-256 File Checksum Calculator
Hash a local file with SHA-256 and compare an optional expected checksum without uploading the file.
Developer toolsOpen toolShare Portfolio Cost-Basis Worksheet
Track in-session purchase lots, corporate-action inputs and gain/loss projections without broker integration or cloud saving.
Investing & capital marketsOpen toolSign PDF
Sign documents online: a PDF or a photo of a document. Type, draw or upload your signature, add initials, your name, the date and ticks, then download the signed PDF.
PDF toolsOpen toolSignature Generator
Make your signature online: type your name in one of ten handwriting styles, draw it or upload a photo, then download a see-through PNG, JPG or SVG.
PDF toolsOpen toolSimultaneous Equations Solver
Solve two linear equations in x and y using elimination, exact fractions and checks in both original equations.
CalculatorsOpen toolSitemap Index Builder & Splitter
Split a large supplied URL/sitemap set into properly bounded sitemap files and generate a matching sitemap index.
SEO & website toolsOpen toolSmart Maths & Learning
Choose a maths topic, work through an explained solution and practise independently with optional device-only progress.
CalculatorsOpen toolSmart Physics Solver
Solve constant-acceleration motion with unit checks, verified displacement, velocity-time graphs and practice.
PhysicsOpen toolSmartwatch Resale Value Calculator
Estimate what your Apple Watch, Galaxy Watch, Garmin or other smartwatch is worth now.
ElectronicsOpen toolSnakes & Ladders
Roll a seeded die, follow a real 100-square board and review every climb, slide and exact-finish attempt with one to four local players.
Board & strategyPlay gameSocial Media Image Resizer
One photo, every size: Instagram, WhatsApp status, Facebook, X, LinkedIn, YouTube and TikTok, in one ZIP.
Image toolsOpen toolSomali Games
Play Somali games online: build phrases, reply in real conversations, count and read market prices, and match words in a memory game. Built from the Somali starter pack.
Kenyan languagesOpen toolSplit PDF
Split a PDF by page ranges, every few pages, every page, or the pages you tap. Download them as one ZIP.
PDF toolsOpen toolSplit Shipment vs One Parcel Optimizer
Compare bounded combinations of packages under a user-entered tariff sheet and package restrictions.
Shipping & merchant logisticsOpen toolsRGB Color Test
Inspect sRGB patches, neutral ramps and saturation patterns.
Screen Testing & ColorOpen toolStatistics Calculator
Exact mean, median and variance for up to 500 values, with explicit population or sample conventions and approximate standard deviation.
MathematicsOpen toolStep-by-Step Algebra Solver
Solve, understand and practise algebra with exact fractions, real quadratic roots, verified working, linear inequalities and two-equation problems.
CalculatorsOpen toolStoichiometry Solver
Compare reactant amounts in moles, identify limiting reagents, calculate theoretical yield and inspect excess reactants.
ChemistryOpen toolStorage & Transfer Calculator
See why storage shows less than the box says, how many photos and videos fit, and how long copying takes.
ElectronicsOpen toolStudy and Revision Timetable Maker
Plan study sessions around subjects, availability, breaks and exam dates.
Study & careerOpen toolSubscription Cost Audit
Subscription Cost Audit. Enter your own figures, review the method and download a local financial report.
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