What are mobile push notification character limits?
The limitation depends on your platform type and your screen size.
The approximate values are:
push description—1000
push title—200
text for a button without parameters—20
text for a button with parameters—1000
URLs (clicks/image)—2000
The total push size for the latest iOS and Android versions is limited to 4Kb.
How fast are mobile pushes sent?
The total average speed for one project is 1.5 million pushes per hour for both platforms.
If you simultaneously send messages in other channels, this may slow down the sending speed.
What are image limitations?
Image limitations depend on your SDK version. To check your current SDK version, please consult the mobile app developers.
For SDK 2.11.0 and later
iOS
JPG and PNG files are supported
the recommended file size is up to 5 Mb.
Avoid using long vertical images as the user has to scroll them down to see the bottom part of the image. For example, images with the 2:1 / 16:9 / 4:3 / 1:1 ratios are displayed in full while the ones that have the 1:2 / 9:16 / 2:3 / 5:7 ratios have to be scrolled down.
1:2 ratio image | 1:2 ratio image |
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Android
JPG, PNG, and WEBP images are supported;
the recommended file size is up to 5 Mb
your image is resized automatically depending on your device width.
We recommend using horizontal images such as 2:1 ones so that your image width matches your text width. If you use vertical images, they will be adjusted to the center and appear smaller in width than your text.
4:1 ratio image | 2:3 ratio image |
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For SDK versions before 2.11.0
iOS
the recommended file size is up to 5 Mb;
the images are displayed in 1:1 and 3:2 ratios
the number of pixels is limited to 1038 x 1038.
On iOS your images are resized automatically. If the image size is over 1038 pixels, it is downsized, and the margins are applied to display your image as a square. To avoid this, use the images with up to 1038 pixels in width and less than 1038 pixels in height.
Android
the recommended file size is up to 5 Mb;
the aspect size is calculated automatically
the recommended ratio is 2:1.