# CHALLNA vs EarnUSD

CHALLNA and EarnUSD are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CHALLNA ships an update every 2 weeks, EarnUSD every 10 days. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | CHALLNA | EarnUSD |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Monetization | Free | — |
| Size | 38 MB | 52 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [RYNYUL](https://appshunter.io/developer/580531175) | [Taiwan1996](https://appshunter.io/developer/1834873750) |

## What reviewers say

### CHALLNA

[App page](https://appshunter.io/ios/app/challna-precise-server-clock/id6759583731)

This app helps you achieve precise timing for critical online events by displaying accurate server time, accounting for network latency. It offers one-touch presets for popular sites, countdown timers, and practice modes to improve your reaction speed for ticket sales, course registrations, and limited drops.

**Highlights:** Millisecond precision synchronization, One-touch server presets, Intuitive countdown timers, Click practice mode, Smart reminders and schedule registration, Direct site access, Dynamic Island support

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

**In-app purchases:** none


### EarnUSD

[App page](https://appshunter.io/ios/app/earnusd-smart-yield-tracker/id6774380152)

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

**In-app purchases:** none


## Frequently asked questions

### Is CHALLNA free?

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

### Is EarnUSD free?

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

### Do CHALLNA or EarnUSD have ads?

Neither CHALLNA nor EarnUSD shows ads.

### Which is updated more often, CHALLNA or EarnUSD?

CHALLNA ships an update every 2 weeks, and EarnUSD every 10 days. Most recently, CHALLNA was updated on October 31, 2026 and EarnUSD on November 10, 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.*