[lern_too_spel]

That $100 per year is required just to keep apps installed on your own iDevices, let alone submitting them for review.

[simonh]

That hasn’t been true since XCode 7. You can side load apps onto your own devices from XCode with a free developer account, you only have to pay the fee to submit apps to the App Store.

[lern_too_spel]

You cannot "keep apps installed on your own iDevices" because without paying that fee, you have to re-sign and reinstall your apps every week.