Day Counter vs EngineerTact

How many days until your next vacation? How long since you quit smoking? Day Counter keeps every important date in one simple, beautiful app — with home screen widgets so you never have to open the app to check. COUNT DOWN & COUNT UP • Count down to future events: birthdays, holidays, weddings, exams, retirement, pregnancy due dates, and more • Count up from past dates: track habits, sobriety, fitness streaks, anniversaries, or any milestone • Choose your display unit: years, months, weeks, days, hours, minutes, seconds — or show all units at once HOME SCREEN WIDGETS • Small widget: 1 event at a glance • Medium widget: 3 events • Large widget: 6 events • Turn widgets on or off per event from the edit screen • See your countdown without opening the app PERSONALIZE EVERY EVENT • Pick from a wide selection of colors and icons • Dark mode support • Clean, intuitive interface — no clutter, no learning curve ANNIVERSARY COUNTDOWN • Automatic anniversary tracking — see how many days until your next yearly milestone BACK UP & SYNC • Sign in with Apple or Google to save your dates in the cloud • Sync across iPhone and iPad • Export your records for backup ACCURATE DATE CALCULATIONS • Months and years change on the correct date — not days early like some other apps • Trusted by users worldwide for retirement, tax deadlines, garden planting schedules, and life events PRO — ONE PAYMENT, NO SUBSCRIPTION • Remove ads forever with a single purchase • No monthly fees, no auto-renewal, no surprises • Fair price compared to subscription-based countdown apps 33 LANGUAGES Fully localized in English, German, Turkish, French, Spanish, Japanese, Arabic, and 26 more languages. PERFECT FOR: • Vacation and holiday countdowns • Birthday and wedding reminders • Retirement day tracking • Pregnancy and baby milestones • School exams and graduation • Fitness goals and habit tracking • Tax deadlines and important appointments • Remembering loved ones and special anniversaries Privacy Policy: https://gokselpirnal.com/saydim_privacy_policy.html

EngineerTact is an offline field toolkit for engineers, land surveyors, RF technicians, and field operators across all domains — land, sea, and air. KEY FEATURES: • WGS84 Geodetic Coordinate Conversion — Convert between Geodetic (Lat/Lon/Alt) and ECEF (X/Y/Z) using the Bowring iterative algorithm. Real-time ENU Local Tangent Plane target tracking with bearing and range. • RF & Radar Calculator — Compute Free Space Path Loss (FSPL), Radar Line of Sight (4/3-Earth model), first Fresnel Zone radius, and signal wavelength. All calculations run on-device. • Mission Brief Planner — Build complete field mission briefs with route distance (Haversine), bearing in degrees and NATO mils, estimated time of arrival, and RF link margin. Save and reload briefs on-device. • Aerospace & Maritime Converter — Convert speed (knots, km/h, m/s, Mach), altitude (ft, m, FL), pressure (hPa, inHg, psi), and ISA atmospheric parameters with full unit coverage. • Number Base & Data Converter — Convert between decimal, hexadecimal, binary, and octal. IEEE 754 float analysis. Bit-width calculator. • Formulas & Reference — Full mathematical reference for FSPL, WGS84 geodesy, Haversine, radar horizon, Fresnel zone, and NATO unit standards. All calculations are performed entirely on-device. No network connection, no account, no tracking, no ads. Designed and engineered by Fırat Bozkaya.