Sangati: Tabla Tanpura Riyaz is free on App Store

Sangati: Tabla Tanpura Riyaz is a native iPhone and iPad app that puts the core tools for daily riyaz in one place. It includes a tanpura with 12 Sa positions and fine tuning, tabla playback for 11 taals, reference tables for 25 taals, a swarmandal with 8 raag tunings and a multitouch harmonium.

It is built for students and performers of Hindustani classical music. The on-device tuner shows notes relative to your chosen Sa, and you can record audio and video of your voice or instrument together with the accompaniment.

No end date has been given for the offer, so claim it soon. Apps you get from the App Store are tied to your Apple ID, so you can normally download it again from your purchase history after the offer ends.