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HoYoverse runs three major gacha titles simultaneously, each with its own premium currency — worth knowing the naming differences since they don't carry over between games despite sharing a publisher.
Genshin Impact: Genesis Crystals
Genshin Impact Genesis Crystals convert into Primogems (the currency actually used for character and weapon banner pulls) and fund the Battle Pass. Genshin remains HoYoverse's flagship open-world title, and its banner rotation cadence is the most predictable of the three for planning pulls around specific character releases.
Honkai Star Rail: Oneiric Shards / Stellar Jade
Honkai Star Rail Oneiric Shards / Stellar Jade fund the same banner-pull mechanic in a turn-based sci-fi setting rather than Genshin's open-world action combat. If turn-based, party-based combat appeals to you more than real-time action, Star Rail is the better genre fit despite sharing HoYoverse's overall gacha economy structure.
Zenless Zone Zero: Polychrome
Zenless Zone Zero Polychrome is the newest of the three, funding a faster-paced action-combat title with a more stylized urban setting than Genshin's fantasy world. It's built around shorter, more arcade-like combat encounters compared to the other two.
Currencies don't transfer between titles
Despite sharing a publisher and a broadly similar gacha economy, none of these currencies carry over — Genesis Crystals only work in Genshin, Stellar Jade only in Star Rail, and Polychrome only in Zenless. Buy the specific currency for whichever game you're actually playing.
Time your purchase around banner releases
Because these are gacha economies, currency is most efficiently spent right before a specific character or weapon banner you want rather than accumulated generically — checking the upcoming banner schedule before topping up avoids leftover currency sitting idle between the release you cared about and the next one.
First-time purchase bonuses are a detail worth checking before topping up any of these three — HoYoverse titles commonly offer a one-time bonus amount of currency on a player's very first purchase in a game, so it's worth confirming whether that bonus has already been used before assuming standard rates apply.
Cross-promotional events between HoYoverse's titles occasionally offer bonus currency in one game for logging into another during a promotional period — worth checking current in-game announcements before a top-up in case a free-currency promotion is already active.
Account-level spending history across all HoYoverse titles is visible in a unified billing portal if you use the same HoYoverse account across multiple games — worth checking this portal periodically to track total spend across titles rather than relying on memory alone.
All three titles are also fully cross-platform between PC, mobile, and (where supported) console, with progress and currency tied to the account rather than the device.
All three games are free to download and play, with the currencies covered here being entirely optional purchases layered on top.
All three games publish detailed patch notes ahead of each new banner cycle, worth reading before a top-up to confirm the content you want is actually arriving on schedule.
Also check Honkai Impact 3rd
HoYoverse's original title, funded via Honkai Impact 3rd Crystals, is a separate fourth economy still active alongside the newer three. All four are listed under the RPG/Gacha section of Mobile Gaming Top-ups.