Currency

Currencies are used to unlock various content in KALPA. The four permanent currencies in the game are Energy, Dark Matter, Star Fragments, and Astral Melody. They may each be viewed in the upper-right corner of the screen on most menus.

Energy
Energy is the most plentiful currency in KALPA. It is obtained by playing songs in Free Play or the Dark Area, completing Daily, Weekly, and Guide Missions, and fulfilling certain Achievements. Energy can also be obtained from the Dark Matter package.

As of version 2.0.12, Energy is used for the following:
 * Purchasing the Ocean Skin.
 * Progressing through Noah.
 * Submitting research in Mero's LAB.
 * Playing songs using Linked Melody.
 * Redrawing songs in the Dark Area.

The amount of Energy awarded after playing songs in Free Play is based on a base value assigned to the chart and further modified by the grade achieved. Playing with a specific variation or condition set, or in Lunatic Mode, does not award additional Energy unless specific characters are used with their skills unlocked. In the Dark Area, 1000 Energy is awarded after every clear; this number does not change even with the use of characters that would normally award additional Energy.

The following characters' skills award bonus Energy when certain conditions are met:

Dark Matter
Dark Matter is the second regular currency in KALPA. It is obtained by playing songs in Free Play or the Dark Area, completing Daily, Weekly, and Guide Missions, and fulfilling certain Achievements. Dark Matter can also be obtained by purchasing the Dark Matter package for 500 Star Fragments.

As of version 2.0.12, Dark Matter is used for the following:
 * Purchasing Guardians and Geopelia from the Pleiades Shop without the acquisition of their respective song packs.
 * Purchasing the Party Queen and Party Poppet skins.
 * Purchasing the Phigros Skin.
 * Purchasing characters' profile backgrounds.
 * Purchasing Play SE.
 * Purchasing certain stickers.
 * Completing phases of Reverse.
 * Progressing through Noah.
 * Completing research for certain packs in Mero's LAB.
 * Charging Astral Melody up to three times daily.

The amount of Dark Matter awarded after playing songs in Free Play is always 1, and in the Dark Area it is always 14.

The following characters' skills award bonus Dark Matter when certain conditions are met:

Astral Melody
Astral Melody is used only for certain specific game modes. Unlike other currencies, Astral Melody recharges over time, with its natural limit being 120. It can also be obtained by using Dark Matter to charge it up to three times daily, as well as by using certain characters' skills; Astral Melody obtained with these methods may go above the limit.

As of version 2.0.12, Astral Melody is used for the following:
 * Progressing through Noah.
 * Playing in the Dark Area.

The following characters' skills award bonus Astral Melody when certain conditions are met:

Star Fragments
Star Fragments are KALPA's premium currency. They are obtained through in-app purchases, with low amounts being obtainable from Aste's Guide Missions, certain Achievements, and ranking seasons in the Dark Area.

As of version 2.0.12, Star Fragments are used for the following:
 * Purchasing song packs, note skins, and Fisica from the Pleiades Shop.
 * Completing research for the Classic and GgonSae packs, and making use of Aste's Help, in Mero's LAB.
 * Unlocking Abyss, Chaos, and Cosmos charts without achieving specific grades on the corresponding Hard+ or S.Hard+ charts.
 * Changing the player's nickname.

There are five purchase options for Star Fragments, with the exact prices for each varying depending on the player's local currency.

Event Currencies
During the 2021 Halloween and Christmas Events, special currencies were added to be used in the Event Shops. Both event currencies were awarded through Daily and Weekly Missions.

Candy
Candy was the limited currency of the 2021 Halloween Event. It was used to purchase the following:
 * Witch Kalpa
 * Mr. Joo Birds
 * Halloween Aste&Mero
 * Biyori icon
 * Mr. Joo icon
 * Halloween background
 * Energetic Candy (3000 Energy)
 * Dark Candy (100 Dark Matter)

Winter Fragments
Winter Fragments were the limited currency of the 2021 Christmas Event. They were used to purchase the following:
 * Snowman Libera icon
 * Christmas Wreath border
 * White Christmas background
 * Energetic Candy (3000 Energy)
 * Dark Candy (100 Dark Matter)