iPhone 5 v. iPhone 6 Battery Cycle Count - Questions

I am using two apps from the app store called "Battery Percentage - Your Device Doctor" and "Battery Life: Check Internal Battery...." on an iPhone 5 and iPhone 6. The iPhone 5 (called just "5" from now on) is 3 years old now and the iPhone 6 (called just "6" from now on) is 1 year old now. Both 5 and 6 are updated to the latest iOS updates. 5 has mostly been plugged in throughout the day - which I admit could have contributed to it's poor battery health as of now. Meanwhile, 6 has been charged, on average, 1.5 times a day and has remained off the charger for the majority of the day.

Anyway, back to those apps I was testing: according to both of these apps (which give the same information):

5:

Battery Cycle Count: 427

Battery Health: BAD-VERY BAD.

6:

Battery Cycle Count: 258

Battery Health: GOOD-PERFECT.

Here are my questions:

1. I have received contradictory information on the maximum battery cycle count for the 5 and 6. I have heard that the 5 has a maximum of 500 cycles before it experiences a 20% degradation and the 6 has a maximum of 1000 cycles. Other websites have stated that all iPhones have a maximum of 500 cycles and only the macbooks have a 1000 cycle maximum. Which is true?

2. If the cycle count is 500 cycles max, why is the 5's battery health rated as BAD to VERY BAD? It's still below the 500 maximum so in theory it should not have experienced any degradation before it hits 500 right?

3. Also, I am now worried about 6. It is currently at 258 cycles and is rated as GOOD to PERFECT. Will it suffer the same fate as the 5? So, in other words, can I expect only another 200 cycles before the battery goes bad? Or does the 6 have a stronger battery than the 5? If so, how much stronger?

4. Recently, due to my (sad) hobby of Pokemon Go, I have now begun charging my 6 about twice a day. Should I slow down a bit? I should mention that I'm getting rid of the 6 in about 7 months and moving onto the iPhone 7 (in late March-early April) so do you think I can charge my phone twice a day until April 2017 without battery failure?

If you need any more hardware info from me let me know.