costheta

Team Rhythmicals Music In-app purchases Contains ads

The Rhythm Action Game Observing Another World

Rating: 4.2; 1.8K ratings
Downloads: 292K+; on Google Play
Price: Free; In-app purchases
Updated: Oct 3; 2026 · v3.1.2

Screenshots

About costheta

The new timeline projected onto the world

Costheta is a rhythm action game. Touch and slide the notes to the beat of the music!

Meet the future world with a variety of music, while working at Extraordinary Technology Institute!

[Are you upgrading from the Trial version?]

To save your data to Full version, make sure you click the "Save data" button in the setting scene before you run the Full version.

What’s new

Version 3.1.2 · Updated October 3, 2026

◈ v3.1 Update Arrived! ◈ 1. New Tracks in COXETA Originals vol.1 - where u go / cillian - DEEP DIVE / TREDDY - SODA / W1DE - Keep Moving On / Sukima Altera feat. SeiiYuumi - 黒雲 -The World FiNALE- / Sukima Altera 2. New Tracks in Primary Observation I&II - MAX OUT / TARO - I'm Going Backwards / chilldive - NEOSEOUL / PRIKA & LVPS - √-1 / inukagami. × Sushi 3. New MIRAGE Patterns - 景：花·水·林 / haru - sibyllinisch / DLight - Silhouette / Miori Celesta 4. Look for Oratorio hiding in the lab...?

User reviews

Christopher Exit

Luv this ❤️ game I wanted something different and I have

Frequently asked questions

Are you upgrading from the Trial version?

To save your data to Full version, make sure you click the "Save data" button in the setting scene before you run the Full version.

App details

costheta is a free Music app for Android with 100,000+ installs on Google Play and a 4.2/5 average rating from 1,881 ratings. It was released on April 18, 2020 and last updated on October 3, 2026. It's developed by Team Rhythmicals. It requires Android 7.0 or later. The app contains ads and offers in-app purchases.

Category: Music
Rating: 4.2 / 5 (1,881)
Installs: 292,090
In-app purchases: Yes
Ads: Contains ads
Version: 3.1.2
Requires Android: 7.0
Content rating: Everyone
Released: April 18, 2020
Last updated: October 3, 2026
Developer: Team Rhythmicals

View on Google Play

Growth

Rating: 4.2 → 4.2
Ratings: +17 in 31 days

Approximate, from Google Play’s install and rating counts on the days we checked (Sep 22, 2026 – Oct 23, 2026).

Listing score

Our ASO checklist, run on this Google Play listing.

Grade C

Description (419 / 4000): Short. Google Play searches the full description, so a thin one leaves keywords out.
Privacy policy (Missing): Google Play requires a privacy policy link for most apps.
Title length (8 / 30): There’s room for a keyword after your brand, e.g. “Brand: What it does”.

See all 6 issues →

Build an app like costheta

Get a ready prompt for Claude Code, Cursor or Lovable: its features and business model, and what its users complain about, for an original app of your own.

Make the prompt →

Is this your app?

Give it a free website

Landing page, privacy policy and app-ads.txt, generated from your store listing.

Create it free

Alternatives to costheta

Looking for apps like costheta? Here are 6 similar Android apps on Google Play. The highest rated is Arcaea (4.7/5), and all 6 are free to download.

costheta vs. alternatives
App	Rating	Price	Installs	Last updated	Compare
costheta	4.2 / 5	Free	100,000+	Oct 3, 2026
polytone	4.2 / 5	Free	100,000+	–	Compare
KALPA - Original Rhythm Game	4.2 / 5	Free	1,000,000+	Oct 19, 2026	Compare
RhythmStar: Music Adventure	4.3 / 5	Free	500,000+	Apr 1, 2026	Compare
DanceRail3	4.4 / 5	Free	100,000+	Jul 9, 2026	Compare
Arcaea	4.7 / 5	Free	5,000,000+	–	Compare
Groove Coaster 2	3.8 / 5	Free	1,000,000+	Mar 6, 2020	Compare

Compare costheta with the top alternatives: ratings, updates, ASO score and keyword gaps →