Stapel, from Techno Stacks, is a mobile first application for managing and keeping track of payments and for invoice generation. Users can segregate data according to clients, different projects and specific payments, manage and track additional payments, add transaction details for past, current and future payments, set reminders for transactions and create, print and send invoices directly from the app. The app also offers features such as fingerprint-based app access, exporting data to Google Drive, digital signature, sync through BlueTooth, and scan images and documents.The app is available on iOS and Android.