In-App-Purchases (IAP) are found in the Jewels of Soul Tab, which can be unlocked by buying the "Jewels of Soul" upgrade for 1.40e4 / 14K Coins.
Jewels of Soul can currently be acquired with real money, or by completing Daily Quests which award Dragon Eggs and cracking these Dragon Eggs through Crafting can provide additional rewards including Jewels of Soul.
Remove Ads is tied to your Apple/Google Account, which is why Remove Ads does not transfer between platforms.
The Steam version has No Ads by default since you cannot display ads on Steam.
All other IAP are tied to your save file and will transfer properly.
You need to have the Steam Overlay enabled for purchases from Steam to pop up.
|Lava Mace||10% bonus CpS.||30 Jewels|
|Lava Scythe||Increase CpS while the game is closed by 30%.||30 Jewels|
|Lava Dagger||15% bonus CpS.||40 Jewels|
|Lava Claw||Increase CpS while the game is closed by 35%.||40 Jewels|
|Reset Portal's Cooldown||8 Jewels|
|25x CpS Bonus||15 Minutes||20 Jewels|
|50x CpS Bonus||15 Minutes||40 Jewels|
|100x CpS Bonus||15 Minutes||80 Jewels|
|250x CpS Bonus||15 Minutes||200 Jewels|
|500x CpS Bonus||15 Minutes||400 Jewels|
|25x Souls Bonus||8 Minutes||20 Jewels|
|50x Souls Bonus||8 Minutes||40 Jewels|
|100x Souls Bonus||8 Minutes||80 Jewels|
|250x Souls Bonus||8 Minutes||200 Jewels|
|500x Souls Bonus||8 Minutes||400 Jewels|
|The Lost Relics||Buy something with Jewels of Soul.|