Coupontools aspires to engineer physical hardware that can be detected by - and interact with - every touchscreen-powered device in the world.

What devices can you expect Coupontools Stamps to work on, what devices are each stamp actually tested on before they leave the factory, and for what devices do we actually warrantee stamp functionality?

Apple iPhone 5
Apple iPhone 5S
Apple iPhone 6
Apple iPhone 6S
Apple iPhone 6 Plus
Apple iPhone 6S Plus
Google Nexus 4 / LG Nexus 4
Google Nexus 5
Google Nexus 6
Motorola Nexus 6
Samsung Galaxy S4
Samsung Galaxy S5
Samsung Galaxy S6
Samsung Galaxy S6 Edge
Samsung Galaxy Note 3
Samsung Galaxy Note 4
Samsung Galaxy Tab 3
Samsung Galaxy Light
Samsung Galaxy Tab 3 Lite
LG G3
LG Pad 7.0 LTE
HTC One M8

Low Performance Devices: These devices are not currently testing well, though they will improve as we continue to hone our hardware manufacturing process. For iPads in particular, we discovered that our most recent manufacturing design fell out of spec for support of this device. We expect to remedy this in future production runs, and will keep this list up-to-date accordingly.

Apple iPhone 4
Apple iPhone 4S
Apple iPad 1st Gen
Apple iPad 2nd Gen
Apple iPad 3rd Gen
Apple iPad 4th Gen
Apple iPad Air
Apple iPad Air 2
Apple iPad Mini 1st Gen
Apple iPad Mini 2nd Gen
Apple iPad Mini 3rd Gen
Samsung Galaxy Tab 3 Lite

Individually unique stamps are not guaranteed to work on a subset of Android devices because of intricacies of each manufacturer's firmware. This can often be fixed by toggling a single default setting that allows the phone to sense more than 3 simultaneous touch events. Once that setting is changed, a small subset of unique stamps can be made to work on these devices. Contact us if you would like to explore your options.

HTC One M8
HTC One M9

Bent and/or cracked phone screens have also been known to cause issues. While we have seen some success, we can't promise that stamps will work reliably on these devices.
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