Russia elections
Navalny app gone from Google, Apple stores on Russia vote day
The app promoted an initiative that outlines for Alexei Navalny supporters which candidate they should back to unseat Kremlin-aligned politicians.
So signs around Moscow are touting 'a million prizes' for voters who cast electronic ballots in the election, which looks set to hand United Russia another majority despite its unpopularity.
Russia's legal information portal showed Putin had signed the bill on barring staff, members and sponsors of "extremist" groups from running in parliamentary elections.
Opinion polls give Putin, the incumbent, support of around 70%, or nearly 10 times the backing of his nearest challenger.
Alexei Navalny tweeted that he had been released and given a document on legal procedures against him for organising unsanctioned protests.
“It’s not an election, it’s a trick,” read one, depicting a goggle-eyed caricature of Vladimir Putin, who polls show should be comfortably re-elected on 18 March.