Bittray

Bittray keeps a drill-bit and tool-diameter inventory on your phone so you can see which sizes you have, how many pieces remain, and which tray or drawer they live in before you dig through the box. Track diameters, types, counts, and locations offline. Record a size Add each bit with the diameter in millimetres or inches, the type (twist, masonry, wood, spade, Forstner, hole saw, or other), the piece count, and a location such as Tray A, Top drawer, or Job box. A short note can hold brand, material, or job detail. Scan the tray Home shows how many sizes and pieces you have, and how many rows are running low. Search by size text, type, or location. Filter by type when you only want masonry or wood bits. Open a row to see the full card. Keep counts current On the detail screen, plus and minus adjust the piece count after a job. Two pieces or fewer shows as low stock on the home tallies. Edit a row when you move a set to another drawer, or remove a size you no longer keep. Guide and settings The Guide is a short offline walkthrough: how to copy a drawer into the tray and how to look a diameter up later. In Settings, choose whether new bits default to mm or inches, load a sample drawer to see a filled tray, or reset everything and start empty. Bittray stores sizes, types, counts, locations, and notes only on this phone. There is no account, no cloud sync, and no ads. The app does not use the internet. It is a notebook for the tray card you would otherwise keep on paper.