If you promote an Android application, it usually takes 3-4 days after the order is completed to see the first results and keyword position increase. Anyway, sometimes there are cases when Google algorithm updates the positions longer, so the results and increase may be seen even 1 week after the promotion is over.
As for iOS apps keywords promotion, the result is usually seen 1-2 days after the order is completed and installs are delivered.
Please note that there are general rules, but sometimes algorithm may need less or more time to update the positions.
