How do I set a reminder for the last day of every month

There are ways to do this with the regular reminders app both for the last day of the month and for every 4 weeks.

For the last day of the month:

1. Create your reminder
2. Click the "i"
3. Select Remind me on a day
4. Select Repeat
5. Select Custom
6. Under Frequency select Monthly
7. Under Every select 1 Month
8. Select On the...
9. On the left scroll to "last"
10. On the right scroll to "day"

For every 4 weeks (or whatever weekly interval you would like):

1. Create your reminder
2. Click the "i"
3. Select Remind me on a day
4. Select Repeat
5. Select Custom
6. Under Frequency select Weekly
7. Under Every select 4 weeks
8. Select which day of the week you would like it to repeat

My wife recently ran into this problem as well and I came up with this workaround:
Set your repeating reminder instead for the FIRST day of every month AND set the reminder alert for 1 day before. That way you will be alerted to the repeating event on the last day of every month, regardless of the number of days in that month.

Hey Mattye88 not sure if you have seen but actully you can do this, but for some reason you have to use Siri. If you bring up Siri and say "set a reminder ever 4 weeks from next wednesday to check the gas meter" it will set one and it will work just fine, I have reminders to water a Bonsai every three days and it works fine it just shows as custom repeat on the user interface. Alas it seems you can not use Siri to set one for the end of the month though which is why I am in this threed. Still hope it helps you to know how to sort this problem atleast.

This is really smart. Thanks.

The one that bothers me is that there's no way to have something repeat every N weeks (in my case, every four weeks). I can have something repeat every month, but that just repeats on the same day each month. I want something to repeat every 28 days, but its impossible 😟

Tell Apple you would like that function: http://www.apple.com/feedback/iphone.html

Don't think you can, you'd have to set it for the 28th as that's the latest date that will accommodate February. 😟

There are calendear apps that allow greater flexibiity in setting appointments. I use Week Cal. Could you set up an appointment with an alert?