Whistle Tune Files on iPad

I have accumulated many whistle tunes written in formal notation in jpeg and pdf files which I would like to store on an iPad. Can anyone recommend a tool or way of organiziing these files? No, I do not read from them as i play. They are a reminder for tunes learned a while ago or when someone plays a new tune I wish to learn.

I save my sheet music on the free portion of an app titled Document by Readdle. Works a treat on the iPad.
Cheers JTU

The mac app ‘preview’ can stitch together PDFs; I combined 65 pages last night for our local session in Leesburg VA. I don’t know if it works on jpegs; you might need to convert them to PDFs first.

Thanks for your suggestions. Will look at them.

I use an app called Tunebook on my iPhone. Worked well on my iPad, too.