Useful apps for guitar?

My New Year's resolution was "This will be the year that I stick with learning the guitar," so I don't know how useful my list will be for someone who already knows how to play. It's a mix of Android apps and mobile-friendly websites. I don't mind paying to support developers and content creators but I do try to steer clear of subscription models.

• I'm using Justin Sandercoe's highly-recommended online Beginner Guitar Course. There is a subscription-based mobile app but the web version is the same course and is free. I bought lifetime access to his Practical Music Theory course, which I'm taking at the same time.
• I'm using the Justin Guitar app without a subscription for the interactive Practice Exercises, which are not currently paywalled. Finger Stretching, One Minute Chord Changes, Scales, etc.
• I bought the Guitar Fretboard: Scales app for the excellent interactive Identify Note and Find All Note Locations training games in order to learn the fretboard.
• Under the Tools section in the subscription GuitarTuna app there is a Custom Chord Game I've found very useful. It's a flashcards-style game which cycles through chords you've selected and challenges you to draw the chord diagram. Some chords are paywalled, so I'm looking for an alternative but haven't found one yet.
• I bought the Functional Ear Trainer app in order to work on my tin ear. (I also downloaded Meludia Melody and Big Ear for ear training but haven't played them much yet.)
• When it comes time to find songs to play I don't have a great solution yet. To support the project I bought lifetime access to Chord Genome which allows you to specify chords you know and provides a list of songs supposedly containing only those chords. It's a great idea and I think curating it using AI could be wild. But right now the site isn't mobile-friendly, the database of songs is limited, and the chord information is only mostly correct.
• I use the Chord AI app to play along with songs found on YouTube. (Have a capo.) After buying the (expensive!) lifetime license in order to support the developer I was disappointed to learn that the Android app is missing functionality (like midi export) present in the iOS app. It's currently my most-frequently used app, but I don't know if in the long-term it will be worth what I paid 🤷
• After Googling the strumming pattern for the song I want to play I work on my abysmal rhythm using the Strumming Machine on Justin's site. (I used 8Strummer the last time I tried to pick up the guitar, but it's no longer supported on the newer versions of Android.)
• I previously purchased the now-unavailable lifetime license for the Songsterr app to play along with songs once I get beyond only strumming chords. For songs not in their database, Guitar Pro files can be uploaded. I think that TuxGuitar would allow conversion of midi to gpx but I haven't tried it.
• I bought the TabFlow app, mostly to support future development. It plays Guitar Pro files in a Guitar Hero kind of style.
• I previously got into the Rocksmith 2014 CDLC scene and found this CDLC Player app. Unfortunately it doesn't play the song, but a now-deleted fork did and I saved the APK here. RocksmithToTab seems to work for converting CDLC to gpx for using TabFlow instead.
• I bought a NUX Mighty Plug Pro headphone amp so when I'm playing along with songs I can get close to the sound of the original (and so my wife doesn't strangle me while I'm practicing.) I use it with the FOSS MightierAmp app instead of the manufacturer's app. I also purchased an M-VAVE Chocolate Bluetooth pedal which can apparently be used to control the headphone amp using the MightierAmp app, but it hasn't arrived yet.
• I just bought Sheet Music Scanner because it was recommended here. I'm hoping to scan some obscure songs from song books then format shift from midi into gpx to upload to Songsterr and/or play in TabFlow.

Anyhow, that's my list for now. I hope it helps someone.

Edit: I nearly forgot! Honorable mention for NewPipe SponsorBlock for allowing me to consume the countless hours of YouTube videos helping to supplement my learning journey without being inundated with ads.

IReal pro for chord charts and backing practice.

Chord AI is good for “what’s the chords in this YouTube video”

https://www.sheetmusicscanner.com is useful for I have sheet music I want to put into guitar pro on the desktop.

Scan; export as musicml; import on desktop. Cleanup.

8Strummer - getting new strum pattens down can be a challenge and this gives a useful visual

The Fender Tune app is pretty useful. It has a tuner, metronome and you can look up scales and chords. It’s also free.

The guitar pro app, in general, is mid. The user experience on it is clunky.

But, guitar pro on desktop is incredible. Very valuable tool.

You can download ultimate guitar tabs and play them in guitar pro. You can take those downloaded files and get them on your phone in a very not user friendly way, and then open them on your phone, and the simple feature of playing and seeing that tab is then available to you through the app on your phone.

I found it was very valuable when I was in a band that me and the other guitarist shared a Google drive of guitar pro files, and we would be able to open them on our respective guitar pro apps to reference parts on our phones during practice.

Then there's the songsterr app. Much better user experience, I think it's free? The guitar pro app is useless if you don't purchase guitar pro. The trouble with the songster app is that you don't get to make or modify any of the tabs, it's just a resource.

But, those are the two that I use.

I'm a fan of Songsterr. The website and the app.are good, even if you dont subscribe

• Mapping and Tonal Harmony Pro: a master class on the harmonic possibilities of any standard or uploaded track. As an idiot guitar player, I can barely understand it.

• Peterson Strobe tuner (with sweeteners)

• ultimate guitar tab: for its ubiquity. Someone should rip it and open source that library. Fuck ultimate guitar. Still, their app has allllll of the tabs.

• garage band: in the iOS ecosystem is absurdly good…and I am a master of Avid, Pro Tools, Live, and Logic but I haven’t really looked back.

I use metronome beats for a metronome.

"TonalEnergy Tuner & Metronome" is easily the best money I have spent on an app, ever

Oolimo, the website and phone app is a great resource for me. It lets you enter notes on a fretboard to identify chords.

Not specifically for guitar but MusicSheets is the best app to collect songs into collections and setlists for performance.

[email protected] might be helpful

A human teaching you. I would have never learned guitar without. But okay might be a useless comment