Cost of living in Kigali (Rwanda) is 50% cheaper than in Aberdeen (United Kingdom)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 495 prices entered by 50 different people.
For example, to keep the same standard of living that would require £4,000 in Aberdeen you would need to make just about £1,987 (2,343,063 Franc) in Kigali.