IOS – Seeking text editor for Dropbox on iPad and iPhone

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I've been using Hog Bay's Plain Text app to edit text files on my Dropbox for the last few years; but as of two days ago it's no longer syncing. Presumably this is because Dropbox have discontinued support for this third party app, since it's no longer available in the App Store.

I'm now looking for a replacement app with the same functionality as Plain Text version 1.7.5.
Have found one called WriteUp which may fit the bill; but not sure if it has everything I want?

I need to edit simple text files with extension .txt (not interested in richtext). Once edited the files must be saved in the same format, i.e. as .txt files.
When I open a Dropbox folder, the app must immediately download all the files in that folder automatically (so they're stored locally on my iPad), and sync them to Dropbox as they're edited. (What I don't want is to have the files download only when they're selected for editing; need the whole folder to be downloaded straight away.)

Most importantly I need a built-in search function similar to WinGrep. I.e. It must search all the files in the current folder and all its sub-folders looking for a string of text. Must search both the filenames and the file contents, then provide a list of matching text files so I can select any one for them for editing.

Best Answer

I’ve been using Editorial, which edits files right in Dropbox (so they sync), though mostly for Markdown files (which it has preview support for). I believe it does have a search feature like you describe.