KATR Web Tools is made by KATR Software, which also builds private, no-account Android apps. Scan a code with your phone or tap a button to find them on Google Play.
Private, local-first notes
Rich text formatting, checklists, embedded images and attachments, voice input and Read Aloud. Lock or fully encrypt individual notes, organize with categories and reminders, and back everything up to a single file you control.
Timers, recipe scaler, converter and baker's calculator
Run several timers at once, or a custom timer that walks through a whole recipe with an ETA for each step. Scale a recipe, turn cups into grams, work out how much to buy, and use baker's percentages. Free to use, with an optional one-time Pro. No account, no ads, no internet needed.
Interval training timer
The classic Tabata protocol, EMOM, countdown and stopwatch, plus custom round-by-round workouts with spoken cues and backgrounds. Spoken motivation, workout history and body metrics are built in.
Ballistics calculator and reloader's notebook
A full ballistic solution at a glance: holds in MOA or MIL and as turret clicks, trajectory tables and graphs, wind, atmosphere, spin drift and Coriolis. Compare setups side by side, print range cards, search a library of over 1,200 bullets, and keep your own recipes and chronograph sessions in the notebook.
A private home inventory and organizer
Keep track of what you own, where it is and what it is worth. Collections with rooms and shelves, items with photos, serial numbers and receipts, boxes and totes with printable QR labels, warranty reminders, insurance-ready reports and encrypted backups. Free to use, with an optional one-time Pro. No account, no ads, no internet needed.
A breath pacer and breath-hold timer
Guided breathing with a circle you can follow, or close your eyes and follow the gentle buzz and soft tones. Presets for box breathing, 4-7-8 and more, plus a breath-hold timer that charts your best and average over time. Free to use, with an optional one-time Pro. No account, no ads, no internet needed.
