What are some alternatives?
When comparing Instaspacer and Captioned, you can also consider the following products
Pretty Captions - Create beautiful captions for Instagram and other platforms
Quik by GoPro - Easiest way to create awesome videos
Drake Captions - Find the perfect Drake lyric for your Instagram caption
Caption Writer for Instagram - Notepad for Instagram – but better.
MotionDen - Free online animated video maker
Caption - Open-source captioning tool to help find the right subtitles.