I'm using the one in the bottom left corner (the one with the hour as a number in the middle and the minute as a circular bar around it). I would love it if you added 24h option for it! I see you have added that on some other clocks.
Also it would be really cool if you added more fonts and ability to make the widget lines thinner.
Yet another slightly wild idea would be if you added the option to have different sets of numeric alphabets. For example:
Roman numerals: I, II, III, IV, V, VI, VII, VIII, IX, X, XI, XII, XIII, XIV, XV, XVI, XVII, XVIII, XIX, XX, XXI, XXII, XXIII, XXIV
Japanese: 一、二、三、四、五、六、七、八、九、十、十一、十二、十三、十四、十五、十六、十七、十八、十九、二十、 二十一、二十二、二十三、二十四
An idea to make this work without you having to do a lot of work setting these in, would be to have a more advanced option to customize and then you get 24 slots that you can fill in with any symbol/text. And maybe a tick for "12h", so there are only 12 slots.
Looking forward to seeing updates! Thank you for your app!