Angry Birds Free

Angry Birds Free is a game demo of the original Angry Birds game, released on January 5th, 2011. It can no longer be played on Apple devices that run iOS 11 or later due to the 32-bit support. It has 24 levels exclusive to the free version and there are 3 levels in each world. There are no Golden Eggs, and unlike Angry Birds Lite, the levels are not in the full version.

In version 1.4.1 (a release made only for the iPad), you could unlock the King Pig level by getting 3 stars on all levels.

In 2013, levels for Bad Piggies and Surf and Turf from the full version were added, and the worlds were changed from Roman numbers to the original chapter numbers.

In 2014, the app was updated to include Red's Mighty Feathers and Short Fuse, as well as extra levels from the full version to maintain a 5 level slot for each story. Later in 2015, version 1.7.0 added the ability to unlock all levels from the first 4 episodes via watching ads.

Poached Eggs

 * 1-1
 * 1-2
 * 1-3
 * 1-4
 * 1-5
 * 1-6-3-21

Mighty Hoax

 * 4-1
 * 4-2
 * 4-3
 * 4-4
 * 4-5
 * 4-6-5-21

Danger Above

 * 6-1
 * 6-2
 * 6-3
 * 6-4
 * 6-5
 * 6-6-6-15
 * 7-1
 * 7-2
 * 7-3
 * 7-4
 * 7-5
 * 7-6-8-15

The Big Setup

 * 9-1
 * 9-2
 * 9-3
 * 9-4
 * 9-5
 * 9-6-11-15

Ham 'Em High

 * 12-1
 * 12-2
 * 12-3
 * 12-4
 * 12-5

Mine and Dine

 * 15-1
 * 15-2
 * 15-3
 * 15-4
 * 15-5

Birdday Party

 * C2-1
 * C2-2
 * C2-3
 * C4-4
 * C4-5

Bad Piggies

 * 21-1
 * 21-2
 * 21-3
 * 21-4
 * 21-5

Red's Mighty Feathers

 * 24-1
 * 24-2
 * 24-3
 * 24-4
 * 24-5

Short Fuse

 * 26-1
 * 26-2
 * 26-3
 * 26-4
 * 26-5

Surf and Turf

 * ST-1
 * ST-2
 * ST-3
 * ST-4
 * ST-5

Discontinuation
The app was removed from the App Store on September 4th, 2015. The online servers were discontinued at a later date. The full version became free when The Mighty League update was released with ads being added as a result.

Trivia

 * This is the second longest Free version to be supported with the first being Angry Birds Star Wars II Free despite that being the full game but with ads on Android.
 * This version was released for Nokia's Symbian^3 on the Ovi Store but its version is still v1.1.0.