# LINK_O vs Chalker

The clearest difference is update cadence: Chalker at every 3 days against LINK_O's every 8 days. Chalker also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

LINK_O ships an update every 8 days, Chalker every 3 days. The most recent releases landed on October 16, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | LINK_O | Chalker |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 56.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 67 MB | 20 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HIVIS.inc](https://appshunter.io/developer/1601345844) | [Eunseo Lee](https://appshunter.io/developer/1896579829) |

## What reviewers say

### LINK_O

[App page](https://appshunter.io/ios/app/link-o/id1601345842)

This app simplifies CrossFit box membership registration and class booking. It allows users to manage exercise records, track body composition, and discover local CrossFit events. Stay connected with your fitness community and streamline your gym experience.

**Highlights:** Quick CrossFit box registration, Instant class reservation, Exercise and WOD record management, Body composition tracking, Event discovery and participation

**Features:** macOS Compatibility

**In-app purchases:** none


### Chalker

[App page](https://appshunter.io/ios/app/chalker/id6768504291)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is LINK_O free?

LINK_O is free to download, with no in-app purchases.

### Is Chalker free?

Chalker is free to download, with no in-app purchases.

### Do LINK_O or Chalker have ads?

Neither LINK_O nor Chalker shows ads.

### Which is updated more often, LINK_O or Chalker?

LINK_O ships an update every 8 days, and Chalker every 3 days. Most recently, LINK_O was updated on October 16, 2026 and Chalker on September 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*