Writing prompts show an apostrophe in the pinyin even before that following character is written. This makes thinking of the correct character to write too easy.
Examples: 妨碍 and 方案.
Suggestion: show the apostrophe only after the character (碍/案) has been written.
Alternative: don’t show the apostrophe at all, the pinyin parts are already separated by a space anyway.
(android app v2.1.2)