Tahatec apps
Small, single-purpose Android apps, each tested against the real tool or rule it replaces. Every app has a page here; the catalogue on the home page sorts them by installs.
Hash GeneratorFree Android app to generate and compare SHA-256, SHA-512, MD5, CRC32 and HMAC hashes for text and files, including multi-gigabyte files. Works offline.
Base64 Encoder DecoderFree Android app to encode and decode Base64 text and files, copy data URIs, wrap at 76 characters or drop padding, with history and undo. 15 languages, offline.
Petrol Price PakistanToday's petrol, diesel, kerosene and CNG prices in Pakistan as notified by OGRA, price history since 2006, a home screen widget, fill-up log and trip cost calculator. English and Urdu.
Gratuity Calculator UAECalculate your UAE end-of-service gratuity under Article 51 of Federal Decree-Law No. 33 of 2021: 21 then 30 days' basic wage per year, unpaid leave, the two-year cap. 8 languages.
Link AnalyzerCheck a link before you open it: expand short URLs, see every redirect with status codes, strip tracking parameters, spot lookalike domains and scan QR codes. Free Android app.
Morse Code TranslatorTranslate text to Morse code and back, play it as sound, flashlight or vibration from 3 to 20 WPM, practise in four levels and send SOS. Offline Android app in 15 languages.
QuickChatOpen a WhatsApp chat with any number without adding it to your contacts. 196 country codes, reusable message templates, send history and Business support. Free Android app.
TV Size Distance CalculatorWork out the right TV size for your seating distance, or the best distance for your TV, for 720p, 1080p, 4K and 8K, in inches or centimetres, with viewing angle and a room diagram.
Income Tax Calculator PakistanCalculate salaried income tax in Pakistan for 11 tax years, 2016-17 to 2026-27: tax due, monthly take-home pay, effective and marginal rate, with the full working. English and Urdu, offline.
APK AnalyzerInspect APK, AAB, APKS, XAPK and APKM files or installed apps on your phone: decoded manifest, permissions, signing certificates, DEX stats, size and 16 KB page-size readiness.
Base ConverterConvert between binary, octal, decimal, hexadecimal and any base from 2 to 36 as you type, with numbers up to 1,024 digits, digit grouping, bit view and history. Free Android app.
BMI CalculatorBMI for adults with the WHO categories and for children and teens aged 2–19 as a CDC age-and-sex percentile, plus body fat, calories, macros and a weight history. Offline, 15 languages.
UAE Petrol PricesThis month's UAE fuel prices for Super 98, Special 95, E-Plus 91 and diesel in AED, the change since last month, price history back to 2015, and fuel economy and trip cost calculators.
Qibla CompassA Qibla direction app corrected for magnetic declination to true north, honest about compass accuracy, with prayer times in 23 calculation methods. Works offline, 15 languages.
SIM Card InfoSee carrier, phone number, signal strength in dBm, network type (4G, 5G), cell tower details and data usage for every SIM and eSIM on your Android phone, with a home screen widget.
Text RepeaterRepeat any text up to 10,000 times or to an exact length, with spaces, commas, new lines or your own separator, numbered copies and saved snippets. Copy, share or export. Free Android app.
Winmail ViewerOpen winmail.dat (TNEF), Outlook MSG and OFT, EML and MHT files on Android: read the message and save every attachment, entirely on your device with remote images blocked.
Chmod CalculatorTurn 755, rwxr-xr-x or any chmod argument like u+x or g-s into plain English, build modes on a grid, decode ls -l, and see where Linux and macOS chmod disagree. Offline.
Deep Link TesterFire any URL, custom scheme or intent:// link and see which app handles it, dissect incoming intents, build links visually and validate assetlinks.json. Android developer tool, 15 languages.
Flip TextTurn text upside down, mirrored, into bubbles, small caps, squares, glitch and more: 13 styles you can copy and paste anywhere. Works offline, 15 languages, no keyboard needed.
JSON FormatterFormat, validate and explore JSON offline on Android: exact numbers, error line and column, duplicate key detection, relaxed parsing for comments and trailing commas, tree view.
JWT DecoderDecode JSON Web Tokens and verify signatures offline: HS, RS, PS, ES and ES256K with secrets, PEM, certificates or a JWKS. Explains every claim and 35 security findings. 10 languages.
RandomizerThirteen random tools in one offline app: random numbers, dice roller, coin flip, wheel spinner, list and team picker, yes or no, passwords, lottery numbers, cards, colours and dates.
UUID GeneratorGenerate UUIDs v1 to v8 in bulk, with sortable v7 that stays in order, seven output formats, and an inspector that decodes timestamps and warns about leaked MAC addresses. Offline.
Regex TesterTest regular expressions as you type: matches, capture groups, replace and split, a plain-English explanation, warnings for syntax from other languages, and code for 13 languages. Offline.
Cron Job CalculatorExplain any cron expression in plain English, see the next run times in any time zone with daylight saving handled, convert between Unix, Quartz and AWS, and export to 14 schedulers.
Shade ShiftA colour puzzle: find the one tile with a different shade before the clock runs out, on bigger boards with closer shades. Daily challenge, screen calibration, colour-vision mode, offline.
PDF ToolkitMerge, split, reorder, rotate, lock, unlock, watermark and number PDFs, and convert images to PDF and back, entirely on your Android phone. No upload, no account, 15 languages.
E85 Mix CalculatorWork out exactly how much E85 and pump gas to add for any ethanol target (E30, E50, E85), with partial tanks, real E85 content by country, octane, AFR and price per energy. Offline.
Pulley & Belt CalculatorSolve belt drives as you type: pulley RPM and size, exact belt length and centre distance, timing belts by the tooth (GT2, HTD, T5, MXL…), multi-stage drives and belt tension. Offline.