UnderLimit is a simple iPhone and iPad utility that helps you compress photos and PDFs to a specific file-size limit.
Instead of guessing between low, medium, or high compression settings, you simply choose the maximum size you need, for example 500 KB, 2 MB, or 5 MB, and UnderLimit optimizes the file for that target while preserving the best quality possible.
It is useful for online forms, application portals, email attachments, document submissions, and any situation where a file must stay under a strict upload limit.
Photos and PDFs are processed directly on the device, so files are not uploaded to an external compression server.
UnderLimit is free to download, includes free compressions, and offers unlimited use through a one-time purchase. No subscription, no ads, and no account required.
I kept running into the same frustrating problem: websites, forms, and email systems often require files to be under a specific size. Most compression tools make you choose a quality level and then check the result afterwards. I wanted something simpler: choose the file-size limit you actually need and let the app work toward that target. That problem became UnderLimit.