In flags mode you see a country's flag instead of a name, and tap where its capital is. Here's how it works, and how to tell apart the flags that look almost the same.
Both are vertical blue, yellow and red stripes in the same 2:3 shape. The official shades differ slightly, most of all the blue: Chad's is a darker indigo, Romania's a lighter cobalt blue.
Indonesia and Monaco are both red over white; Monaco's flag is squarer (4:5) and Indonesia's longer (2:3). Poland is the reverse: white on top, red below.
The same three colours, mirrored: Ireland has green next to the pole and orange at the far end, while Ivory Coast has orange next to the pole. Ireland's flag is also longer (1:2 against 2:3).
Both are red, white and blue horizontal stripes. Luxembourg's flag is longer and its blue is a clearly lighter shade; the Dutch flag uses a darker blue and a slightly darker red.
Both are dark blue with the Union Jack in the corner. Australia has white stars, including a large seven-pointed star under the Union Jack; New Zealand has four red stars with white borders.
Mali is plain green, yellow and red vertical stripes, and Senegal is the same with a green star in the middle. Guinea reverses Mali's order: red, yellow, green starting from the pole.
All three are white, blue and red stripes. Russia's flag has no emblem. Slovakia's shield is red with a white double cross on three blue hills; Slovenia's is blue with the white peak of Mount Triglav, in the top corner by the pole.
Colombia and Ecuador both have a yellow stripe twice as wide as the blue and red ones; Ecuador adds a coat of arms in the centre. Venezuela's three stripes are equal, with an arc of eight white stars on the blue.
Both have a cross with a white border, set closer to the pole. Norway's flag is red with a dark blue cross; Iceland's swaps the colours: sky blue with a red cross.
Bahrain is red with five white points, one for each of the five pillars of Islam. Qatar is a darker maroon with nine points, and its flag is much longer: more than twice as long as it is tall.
All three are blue, white and blue. Honduras has five blue stars in the middle. Nicaragua and El Salvador both show a triangle with five volcanoes: El Salvador's is framed by flags and a green laurel wreath, Nicaragua's by a ring of gold text.
Both are green, white and red vertical stripes. Mexico has its coat of arms, an eagle on a cactus, in the middle, and its flag is longer (4:7) with darker colours. Italy's flag is plain.