Tasbih Fatimah counter. 33 · 33 · 34

Say SubhanAllah (glory be to Allah) 33 times, then Alhamdulillah (all praise is for Allah) 33 times, then Allahu Akbar (Allah is greatest) 34 times. Many people complete the hundred with the words reported in Sahih Muslim: La ilaha illa Allah wahdahu la sharika lah, lahul mulku wa lahul hamd, wa huwa ala kulli shay'in qadir.

The extra one brings the total to a round hundred. In the widely reported wording of the tasbih after prayer, SubhanAllah and Alhamdulillah are each thirty-three and Allahu Akbar is thirty-four, completing one hundred. Other authentic wordings put all three at thirty-three and close the hundred with the declaration of tawhid, and both are practised.

The usual time is immediately after the closing salam of each obligatory prayer, before standing up. It is also reported as a dhikr said at bedtime, taught to Fatimah when she asked for a servant to ease her household work, with the Prophet ﷺ telling her this was better for her than a servant.

Nothing is invalidated by losing count. Either estimate and continue, or start the current phrase again. On this counter you can undo a mistaken tap, or adjust the phase directly if you overshot, so an accidental extra tap on the first 33 does not force you to restart the whole set.

Yes, and counting on the right hand is the practice reported from the Prophet ﷺ and is considered the most virtuous method. Beads and digital counters are permissible aids for keeping track, particularly for larger totals or when your hands are occupied.