A broad task, several possible apps
“Photoshopping” is often used loosely for editing an image, but different Adobe products and other editors serve different workflows. Adobe’s Photoshop Express iOS guide describes its mobile editing and collage application. This article uses current documentation; it does not imply that the 2010 software had today’s controls or feature set.
Decide what needs to change
Start by naming the edit: straighten the horizon, improve the crop, adjust exposure, or prepare a picture for a particular layout. A clear goal makes it easier to notice when an effect is helping and when it is simply making the photograph look different.
Keep an untouched original before a substantial edit. Compare the result at the size people will actually view it, rather than judging every adjustment while zoomed in. A correction that looks subtle on the phone can become obvious in a larger display.
Inspect the exported file
Before relying on any editor for work, export a sample and check its dimensions, appearance, and file type. If a publication or client has requirements, verify that the final file meets them. Do not assume a preview on screen describes the saved result.
Review which features are available under the current account or plan. A tool visible in the interface may have different access conditions from basic editing, and those conditions can change over time.
Keep the image’s purpose honest
For documentary images, distinguish ordinary presentation adjustments from changes that alter what happened in the scene. Retain the original where provenance matters. For creative work, use assets you have permission to edit and publish.
This is a workflow guide based on official documentation, not a hands-on comparison or an endorsement of every filter. A good edit serves the image and its intended use.