Mobitool

186 tools in 18 categories: PDF editing, photo compression, converters, a subnet calculator, a filament picker for 3D printing and plenty of small jobs that usually need an app of their own. No ads and no sign-up. On the first launch the app asks what you do and builds the home screen from the tools that fit. The rest sit in the catalog with a search by name and keywords. DOCUMENTS AND PDF • PDF editor: sign, fill in forms, add text, drawings and stamps, highlight or redact text, crop and reorder pages • Merge PDF, PDF pages, images to PDF, PDF to images, text from PDF, remove the password from a file you can open • Document converter for DOCX, ODT, RTF, EPUB, FB2, HTML, Markdown and TXT, ZIP archives PHOTO, VIDEO AND AUDIO • Shrink photos to a file size, convert images, HEIC included, edit photos, strip EXIF and the location • Video converter and a multitrack video editor, frame from video, GIF from video or photos • Audio converter and editor for MP3, WAV, FLAC, OGG and M4A NETWORKING • Ping over ICMP, TCP and HTTP, traceroute, port and LAN scanners, Wake-on-LAN • DNS over DoH and UDP, whois and RDAP, my IP, speed test, HTTP requests, TLS certificates • IPv4 and IPv6 subnet calculator, splitting and VLSM, MAC vendor from the IEEE registry MONEY, CONVERTERS AND CALCULATORS • Currencies and crypto, loans, compound interest, discount and VAT, tips, shared expenses, unit price, trip and electricity cost • Units, number bases, numbers in words, clothing and shoe sizes, cooking measures • Percentages, scientific calculator, fractions, renovation, tire size DEVELOPER AND SECURITY • JSON, Base64, hashes and HMAC, regular expressions, JWT, UUID, URL, CSV, cron, chmod, semver, HTTP codes, MIME types • Password generator, strength and leak checks, TOTP codes, checksum compare TEXT, DESIGN AND TIME • Text counter, case, diff, wrong keyboard layout, mojibake, transliteration, Morse code with sound • QR codes and barcodes with a camera scanner, colors and palettes, WCAG contrast, Material 3 scheme • Timer, stopwatch, world clock, date calculator, calendar, sunrise and sunset ELECTRONICS AND 3D PRINTING • Ohm's law, resistor color code, LED resistor, voltage divider, wire gauge • Filament picker with figures from the makers' data sheets, print cost, flow and E-steps, temperature tower MEASURE, SOUND AND HEALTH • Ruler, level, compass, GPS, light meter, metal detector, barometer, pedometer • Tuner, sound meter, spectrum analyzer, tone and noise generators, metronome • Workout builder and timer, heart rate zones, calories and macros, sleep, water (This is not a medical product. The results are for informational purposes only and do not replace a doctor’s consultation.) Calculations run on the device. Only the tools that need the internet by their nature, such as currency rates, ping and DNS, go online, and they talk to the service named in the tool. The app sends usage statistics and crash reports to Google Firebase: which screens and tools were opened. What you type into the tools is not sent. The source code is available on GitHub under the PolyForm Strict license.