# chrtz — Walk, Rank and Own the Heatmap

> Walk, Rank and Own the Heatmap (iPhone/iPad app by Sungsu Choi.)

- Source: https://appshunter.io/ios/app/chrtz/id6757950661 (this page in markdown: same URL + `.md`)
- Developer: [Sungsu Choi](https://appshunter.io/developer/1718370500)
- Category: Health & Fitness, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 16.2 · 59 MB
- Languages: American English
- Released: 2026-02-19
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/chrtz/id6757950661/reviews.md

## What is chrtz?

A step‑based character ranking app with heatmap visibility and group competition.


chrtz turns your steps into rank.

Pick your favorite character, compete in solo or group rankings, and climb the leaderboard.
Top spots unlock visibility perks—like message highlights and a larger presence on the heatmap.

Track progress with Live Activity, earn rewards, and customize your character’s look with avatars and backgrounds.
Every step counts, and every rank change is real.

Highlights

Step‑based solo & group rankings
Top‑rank visibility perks (message highlight, heatmap presence)
Live Activity for quick progress checks
Character customization (avatars & backgrounds)
Events and rewards tied to activity


## Version history (last 2 releases)

### 1.0.1 — 2026-02-28

bug fixed

### 1.0.0 — 2026-02-20

No release notes.

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## More apps by Sungsu Choi

- [블러비](https://appshunter.io/ios/app/id6473075490)
- [온리펫츠](https://appshunter.io/ios/app/id6744012429)
- [Tamadoro](https://appshunter.io/ios/app/tamadoro/id6748783196)
- [TAIMA - sports timer](https://appshunter.io/ios/app/taima-sports-timer/id6749676494)
- [knittingale](https://appshunter.io/ios/app/knittingale/id6759490912)

All apps by Sungsu Choi: https://appshunter.io/developer/1718370500

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*