Usually the Playstore is the best place to start....
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There is no ir remote app for external IR blaster in Playstore
IRdroid and Touchsquiq are just two I was able to find within 10 seconds of searching for IR programs - you must be doing something wrong with your searches....
Therefor your statement is totally wrong ;)
Actually, if the OP is talking about the 3.5mm headphone jack IR blasters then there is only 1 app that I could find for them that actually works called ZaZa Remote.. it has a massive database of devices. The two you mentioned wont work with the headphone jack IR blasters.
IRdroid does not have all models in database and touchsquid does not support own made IR dongle!!!