You can open any PDF in Adobe Reader.
However, if your payslip is in Word/Excel format then also you can convert these file types to PDF via paid service called "Adobe PDF Pack". For this you have to subscribe this service.
Please note that Adobe Reader for iOS itself is a free app but the subscription for the Word/Excel to PDF conversion is a paid service (i.e. not free).
Hope this help.
Thanks,
Adobe Reader Team
