WordPress.org

WordPress plugin installation

1. Upload plugin-name.php to the /wp-content/plugins/ directory
2. Activate the plugin through the 'Plugins' menu in WordPress
3. Make sure you set the Admin > Settings > Permalinks to something other than "default"

Optionally: install WP Touch, free, or WP Touch Pro, paid, or a similar WordPress mobile theme to ensure a nice mobile friendly layout for your images.

Instructions below for a couple of Twitter apps I've tested this on. There may be other apps this works with, on platforms I'm not familiar with (e.g. Android, WebOS, etc), feel free to Give It A Go™ and let me know how you get on, please!

Settings for Twitter for iPhone

1. Launch Twitter for iPhone
2. Tap on the three dots bottom right ("•••")
3. Tap on "Accounts & Settings"
4. Tap on "Settings" (bottom left)
5. Tap on "Services" (you might need to swipe down the screen to find it)
6. Tap on "Image Service"
7. Tap on "Custom…"
8. Still with me?
9. Clear any value in the form field, and copy/paste the value from your "Endpoint" field in your WordPress user profile into the "Image Service API Endpoint" field... you might find it easier to copy the text into an email on your iPhone, copy it from the iPhone Mail app and paste into the field (here's a cheesy man showing you how to copy/paste)
10. Tap "Save"
11. You're done… Phew!

Settings for Twitterific on iPhone/iPad

1. Launch Twitterific
2. Go to create a new Tweet
3. Tap on the Camera icon on the right
4. Choose "Change Upload Service"
5. Tap "Other" at the bottom
6. Nearly there…
7. Clear any value in the form field, and copy/paste the value from your "Endpoint" field in your WordPress user profile into the "Image Service API Endpoint" field... you might find it easier to copy the text into an email on your iPhone, copy it from the iPhone Mail app and paste into the field (here's a cheesy man showing you how to copy/paste)
8. Tap the "Upload Service" back button top left
9. Tap "Done" top right
10. Yep, you're done now… tweet away!

Settings for Tweetbot for iPhone

1. Launch Tweetbot for iPhone
2. Navigate to the "Accounts" screen (keep tapping top left button), if you aren't already there
3. Tap on the "Settings" button
4. Under "Account Settings", tap on the account you want to set up
5. Tap on "Image Upload"
6. Tap on "Custom" (towards the bottom of the list)
7. Clear any value in the form field, and copy/paste the value from your "Endpoint" field in your WordPress user profile into the "Image Service API Endpoint" field... you might find it easier to copy the text into an email on your iPhone, copy it from the iPhone Mail app and paste into the field (here's a cheesy man showing you how to copy/paste)
8. Tap "Done"
9. Tap the top left back button a few times to get back to the "Accounts" screen
10. You're done… Phew!