Is 4s suitable for iOS development?

Question

iPhone

i6s are expensive, i5s more or less, and i4s are quite nice.
Are there good arguments to buy an older model?

Answer 1

In a year, iOS 9 will be released, which, with a high degree of probability, 4s will not support. The 4s has a 3:2 aspect ratio while the 5/5s/6/6plus has a 16:9 aspect ratio.

Answer 2

If it's a matter of price, then buy a used iPod touch 5 or iPad 2 / mini.
Buy something else next year.
It is clear that the more devices, the better. If there is still money, then I would buy an iPad Air and the same iPod Touch 5. And I would take a smartphone on Android.

Answer 3

Suitable, but only "at the start", the above iPads and iPods will also work.
In general, if we talk about "serious" development, then we need target devices, and in a live form.
Given the fetish of Apple users for new technology, the latest line is needed.

Answer 4

I have my first iPad and iPhone 3GS - and I use them very well for development.