I'm sorry, I probably gave you a false hope, but that was absolutely unwanted. After reading again the specs, this is what I've found in AppStore preview about Snapchat:--> Snapchat on the App Store
If you go down to "Compatibility" there is a sort of contradiction:
Requires iOS 10.0 or later. Compatible with iPhone 5S, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max... (and then it talks about different devices)
I don't know why they say Requires iOS 10.0 or later (supported by model 5 or 5c), but then those models are not listed for compatibility (only model 5s or later). That's really weird / misleading.
I do not use Snapchat, so, the best thing to do is to contact Snapchat's support team and ask them.
Click here:---> https://support.snapchat.com/en-US
Regards and best of luck.
Giulio