Nor vpn, nor tor, nor airplane mode solves my use case when I just don't waste my limited mobile data by apps that can "wait" until I'm on wifi. 

 There is disabling usage of mobile data while the app is in the background, if that helps:


https://image.nostr.build/1bf7de275c17be9dd11beae8907bcfa7f154a11f8bfc88da2d293146d6355d54.jpg#m=image%2Fjpeg&dim=946x1920&blurhash=%5B77UPIxtD%24aexuWCIUt7D%24j%40%25NWA4mof-%3Df6WYa%23jYof%3FdWAIUWBM_a%7ERiof9EjsxvWA9Eayxuj%40&x=d39b6485d29b99b6470a0f8d77df252e885503ce099c0e5c5daab746089c1845