3 star evolutions for 200 matts

My friend and I both started playing right when it was available worldwide. He plays on android and I’m on iOS, and that’s the only difference. We both have purchased a few items, but nothing major. He made me a bet at work about how much it costs to evolve a 3 star normal bird. I said 250, which is what it costs me, and he swears it was 200, which I thought he confusing with a sale that was going on that gave you 200 materials. We compare games and he gets all 3 star evolutions of all bird colors for 200 materials and I have to pay 250. Anyone know what’s going on?