Lagrange Files for iPhone
Your files, calm and close at hand.
Lagrange is a file manager for iPhone that keeps your documents, scans and pictures on your phone, helps you find them again in seconds, and hands them to other apps cleanly. No account. No server of ours. Nothing about how you use your files leaves your phone.
What Lagrange does
Keeps your files on your phone
PDFs, Word and Excel files, pictures, notes and scans live in Lagrange on your iPhone. You do not need a cloud or an account to use it.
Helps you find them again
Folders, an optional topic tag and references, and one search that tells you why each result matched. Everything is worked out on the phone.
Does the everyday jobs
Scan a paper, edit a PDF, convert a file, zip a folder, check a file before you open it. Every change can be undone.
Private
A sealed place for your most personal files, encrypted on the phone and opened with Face ID or your code. It is covered when the screen is recorded or shown in the app switcher.
The door your files go through
"Save to Lagrange" from any app's Share button, and clean hand-over to other apps, including AI apps, when you choose to send a file.
Your clouds, on your terms Coming soon
Copy files to and from your own Google Drive when you ask. Lagrange only sees the files you pick and the ones it saved there for you, and nothing syncs by itself.
Private by design
No account, no server of ours
Lagrange has no sign-up and we run no server that receives your files. When you connect a cloud such as Google Drive, files go directly between your iPhone and your own cloud account.
No tracking, no ads, nothing sold
There are no analytics, no advertising and no tracking code in the app. We do not sell or share your data, because we do not collect it.