Appeal is a legal remedy to challenge the judgement given by the lower court and to request the higher court to review the case. Whereas, Revision is a legal remedy where a person request the same court to review its own judgement.

Appeal and Revision are both remedial mechanisms available to parties to secure justice in both civil and criminal matters. Similar in outlook they differ significantly in their grounds and procedures.
Appeals are filed in a higher court against the order/decree/judgement passed by the trial court generally within a period of 30 days.
Contained in Sec 96-105 under Cpc, this can involve both questions of fact or law.
Revision on the other hand provides for a more stricter scope, revisional powers can be exercised by any higher court under Sec 115 Cpc to asses only the procedural and jurisdictional compliance of the trying court, there’s no revaluation of the facts or evidences. It lies usually when appeal isn’t allowed or in the face of a jurisdictional error to provide for redressal mechanisms to parties and uphold justice.