There are 3 main types of tourist visas for Oman, the differences between them are outlined below, so that you can make the right choice before you apply.
Each e-Visa issued must be used within one month. The "validity period" of the e-Visa only starts from the time of passing the Omani immigration. Please note that these maximum periods of stay must be respected or you risk paying a fineof 10 OMR per day of delay and permanent exclusion from the country.