I have checked this with ios 9.3.3.working successfully,should wait 10-15 minutes to get likes.The more likes you want the more time you should wait .
The link for app
InstaLikes for Instagram by Suleyman Ogtem
Cydia source to add:-
Credit for flex3 tweak ‘instalikes ultimate’ goes to ‘jneu954’
Write down comments if you have any issues.