This app was mentioned in 6 comments, with an average of 1.17 upvotes
I kind of do, though it's mostly for traveling. I only have a laptop as the next-biggest portable thing so a netbook/Chromebook isn't an option for me.
It's a little 7" tablet and I have a Bluetooth keyboard that pairs up with it. I use a simple text entry program instead of anything fancy and it does fine for just entering text instead of formatting it and all that, but I can work completely offline. I probably need to look into Google Drive/Docs to see if those work offline too, but at least Lesser Pad is fast.
This setup is definitely better for writing first drafts and copypasting into my actual document than for editing, though.
I do sometimes. It's not the best but when you have shitty handwriting (and nothing to write on), you kinda learn fast how to thumb-type on a 5" phone. Any port in a storm, right?
I'm frugal with my data so I write in plaintext using Lesser Pad and transfer it to my computer through Dropbox when I'm done. I don't get italics or bolds this way, but that's fine. LP is light, ad-free, bullshit-free.
I use Multiling O Keyboard of all things to type because I could not for the life of me find a keyboard that had a wide enough space bar. It's weird to have a keyboard app have a learning curve but having custom key placements was really nice. I still struggle with it sometimes, but it's worth it I think.
I would also go for a Bluetooth keyboard for your phone if you're not interested in learning touchscreen typing. Some apps like Lesser Pad let you adjust the size of the text so that can help with visibility concerns. Even better if your case has a stand or you have some other way to prop it up.
At least this way it's one extra thing to carry since you're very likely going to have your phone on you already.
I load up Lesser Pad and use my phone in landscape mode. Mine has the mode where it makes a white box to display your text as you write it, so it's bigger/clearer despite your font settings for the document and all. Apart from that, you need to wrestle with your on-screen keyboard.
I've been using Hacker's Keyboard (with the dictionary addon) lately. It's not the most customizable thing out there but it has three different layouts, and working arrow keys (I have the worst luck trying to steer the cursor by touch alone). You can set things like vol up/down to increase/decrease the size of the keyboard, too. I currently run 60% high in landscape, 5-row compact with a 50% 5th row height adjustment. Still trying to feel my way around with it. Only bad thing is that backspace moves with the different layouts!
Just keep trying to practice with typing this way and you'll kinda get the knack, though it'll be slower than using a real keyboard. You could always try to carry a portable Bluetooth keyboard with you, but I dunno how feasible that'd be. I'm still going to experiment a bit with on-screen ones, but it's an "any port in a storm" kinda situation for me.
Good luck.
Edit: Guess I'm the only one who doesn't keep their data turned on all the time. The joys of prepaid!
I've honestly been using Lesser Pad. Basic, but I can bang out the text and send to Dropbox easily enough to paste back into my main document.
I use the phone as-is. Pain in the ass, but it's good in a pinch and I don't have to carry anything extra with me. No need to keep legs close together for the keyboard, no need to find something to prop the device upon, etc. Trade-off is then needing to learn how to type with just your thumbs. I have an Android phone and the screen isn't really big, but I used to write on a 2nd gen iPod Touch so it's at least an improvement on that. I always write in landscape, and bigger devices would make that kinda hard since my thumbs are only so long.
The apps I use...
Lesser Pad. It's a basic no-frills text editor. It doesn't support italics/bold/underline, so I'll either mark it during writing or try to remember to catch it during editing.
MultiLing O Keyboard + Emoji. I don't really suggest this for most because it actually has a bit of a learning curve, but it has a lot of settings and I honestly got this so I could move the spacebar more to the right because of how I type, or change what symbols are secondary to which key. Hacker's Keyboard is an old favorite and many people swear by GBoard.
Dropbox just because but at least you can just email yourself.
I have a Microsoft Sculpt that I got a few years ago for about $30 and it's okay. I wanted something that'd fit in my laptop bag and no other Bluetooth keyboard I found was good for the price or size. I've seen some smaller-form BT keyboards in places like Half Price Books, but YMMV heavily on stock and condition. I actually bought this because I'd write in the backseat on my 10" tablet using it since typing on its on-screen keyboard wasn't actually comfortable and I didn't have a smartphone then.