Sharp, flat, and natural symbols on Android and iOS devices

There are lots of ways to handle music symbols like sharps (♯), flats (♭), and naturals (♮) on iPhone/iPad and Android devices:

• Not recommended: Use a pound/hash/number sign for sharp, and a lower-case b for flat. It’s ugly and unprofessional, and in some cases unclear, plus there’s not an obvious solution for natural.
• Spell it out. Use forms like F-sharp, B-flat, or C-natural. Use a capital letter for the note name, then a hyphen (no spaces), then the name of the accidental in lowercase. For appropriate situations, this version is easy, clear, professional, and doesn’t require any special tools or setup.
• Copy and paste. You can copy and paste symbols from a place you know them to exist, like a web page or your favorite notes app, using your device’s copy/paste method.
• Use the built-in clipboard. My Android phone has a clipboard history, so if I have cut/copied/pasted the symbols recently, I can use them again. (Not all Android devices have this feature.) I tap and hold where I want the symbol to appear, and then choose the Clipboard popup. Then I can scroll through recent clipboard items and find the symbol I want. I can tap the symbol to paste it, or tap and hold to get the option of locking it to the clipboard so it will always be there.
  As far as I can tell iOS does not currently have this feature.
• Use a clipboard app. For example, Clipper – Clipboard Manager on Android will let me create “snippets” that I can access from a persistent notification, and copy to my clipboard for pasting into text. Copied on iOS also provides ways of saving clipboard items for future use [update: app appears to have been removed from App Store].
• Use autocorrect. On my Android phone, I can add words to the “personal dictionary” to incorporate them into the autocorrect feature. (On my device it’s in Settings → General management → Language and input → Personal dictionary, but on yours it might be different.) My preferred method is to add -sharp or -flat or -natural as the shortcut, and paste in the symbol as the “word.” Then, when I type A -flat, my phone offers the symbol as a correction. Notice there’s a space after the A. That’s because my phone won’t offer an autocorrection for a partial “word,” like the -flat in A-flat, so I have to trick it by putting in a space, which I can delete after accepting the autocorrect. I could get around this by adding a separate personal dictionary entry for each note, like A-flat, B-flat, C-flat, and so on.
  On iOS, use Settings → General → Keyboard → Text Replacement, and tap + to add -sharp etc. as the shortcut and the symbol as the phrase. As with Android, this requires typing the note name and then a space before the -sharp.
• Use a text replacement app. On Android I like Texpand. I can create a phrase with, for example, -flat as the abbreviation, and ♭ as the phrase (paste it in), then enable that phrase’s “Expands immediately” and “Expands within words” options. Then typing E-flat immediately corrects to E♭ in any phone app. (This is my current favorite Android solution.)
  On iOS TextExpander + Keyboard offers similar functionality but requires using a special keyboard and does not appear to have an “Expands within words” option, so you must type the note name, then a space, then -sharp.
• Use a special characters app. Something like Character Pad – Symbols works well on Android. Use the search function to find the symbol you want, then tap the heart to add it to your favorites, or tap COPY and it will automatically be added to your “Recents.”
  iOS has similar apps available, such as Unicode Map and Code Table. Use its search function to find the symbol you want, and it is automatically added to your “Frequently Used” list.
• Use a custom keyboard. Some keyboard apps (such as CustomKey Keyboard on Android) will let you customize the key layout, so you can add any special characters you want.
  On iOS, Keyboard Characters & Symbols provides access to lots of symbols, including musical ones, and it’s easy to switch between it and your other favorite keyboards. (This is my current favorite iOS solution.)

Using the correct symbols is the right choice for clear, professional communication about music. Do you have another solution for using these symbols on mobile devices? If so, please share in the comments.