A Tamagochi/Dating Sim mix developed by Just Nice Things and published by Nutaku. The game is focused around taking care of several women with different personalities and unlocking their sex scenes while also learning more about them and about the world during Events.
Gameplay
Pocket Waifu is a Tamagochi game first and foremost, so it plays like an ordinary Tamagochi would - a selected girl has four stats, Happiness, Hunger, Cleanliness and Energy. By keeping those stats up, the player earns her Affection, which is necessary to progress in a relationship. The player can use consumables to increase them, play Minigames or poke the girls to increase their happiness and give them gifts to increase their Affection. Collecting Mementos from Gacha increases the girls' relative stat maximums and gains
Source: The Developer Website.