Android users have an embarrassment of options for resizing photos, and most of them are fine. The problem was never finding an app. It's finding one that exports exact pixel dimensions instead of vibes.
Search the Play Store for a social media image resizer app iOS Android and you get dozens of results. Most are ad-heavy. A few are genuinely useful. Here's how to sort them. First, can you type exact dimensions? If it only offers an Instagram preset with no pixel readout, skip it. Specs change, and you want numbers you can verify. Second, does it preserve quality on export? Zoom into the exported image. If the edges went soft, the app is recompressing aggressively. Third, does it keep presets? A mobile app to resize photos for every platform should remember your Pinterest 2:3, your Instagram 4:5, and your YouTube thumbnail 16:9 between sessions. If you're retyping numbers every time, the app failed.
Five options worth comparing: a dedicated resizer with typed dimensions, a design tool like Canva's mobile app, InShot for the video side of your workflow, your phone's built-in gallery editor for quick crops, and a web-based resizer for when you'd rather not install anything. None is the best in any absolute sense. The best Android setup is the one whose presets you actually trust. Trust matters more than features here, because you stop checking after a while.
Free versus paid. A video spec formatter app free on the Play Store handles most creators' needs. Paid tiers buy you batch processing and no watermarks. If you see a watermark on exports, you're using the wrong tier, not the wrong app. That's a pricing problem, not a tooling problem.
One last habit: run the output past a social media post size checker before posting. Ten seconds. Catches everything. We track the current dimensions every checker should use at easyimagevideo.com, and our formatting service will handle the resizing for you if apps aren't your thing.