Tech giants have run into controversy after bowing to pressure from governments to change highly disputed and politicised content.
The iPhone maker Apple came under fire after its maps for users in Russia referred to Crimea, which was annexed by Russia in 2014, as part of Russia.
The EU and the US have condemned the annexation as illegal and do not recognise Crimea as Russian, introducing ongoing sanctions in response.
Apple said the move was due to a new law in Russia, but it was condemned in Ukraine.
The Ukrainian embassy in the US wrote on Twitter: "Let's all remind Apple that #CrimeaIsUkraine and it is under Russian occupation - not its sovereignty."
Ukrainian foreign minister Vadym Prystaiko wrote on Twitter: "IPhones are great products. Seriously, though, @Apple, please, please, stick to high-tech and entertainment. Global politics is not your strong side."
He compared Russia's annexation of Crimea to having a "piece of your heart stolen by your worst enemy" and suggested Apple didn't "give a damn" about its pain.
Russian ex-world chess champion Garry Kasparov, who was briefly jailed in 2007 for taking part in an anti-Kremlin rally in Moscow, called the decision "unacceptable appeasement".
He added: "Where is the backlash? American consumers have the power to change the world for the better by protesting against such things, from Crimea to Hong Kong. Stop letting tech companies and tyrants have it both ways."
Apple said it was now reviewing how it handled "disputed borders", adding it took into account international, US and domestic laws before labelling its maps, and made changes if required by law.
The row came as social media giant Facebook on Friday added a correction to a post on the Facebook page of anti-government website States Times Review, following a demand from Singapore authorities who claimed it contained false information.
Facebook posted a label underneath the post saying "Facebook is legally required to tell you that the Singapore government says this post has false information", next to a link to the government's fact-checking site.
The controversial new law on misinformation in the City state came into use on Monday but has been criticised as an attack on free speech.
Amnesty International has said the law will give Singapore authorities "unchecked powers to clamp down on online views of which it disapproves." Transgressions can lead to fines of up to $730,000 [£564,687].
Facebook, whose Asia headquarters its Singapore, said it hoped the law would be implemented in a "measured and transparent" way.