# CHALLNA vs SwitchPDF

The clearest difference is in-app purchases: CHALLNA at none against SwitchPDF's 1. CHALLNA also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. SwitchPDF sells 1 one-off in-app purchase. CHALLNA asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | CHALLNA | SwitchPDF |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 38 MB | 14 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RYNYUL](https://appshunter.io/developer/580531175) | [MBG Studio](https://appshunter.io/developer/1401126212) |

## 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


### SwitchPDF

[App page](https://appshunter.io/ios/app/switchpdf-image-to-pdf/id6794580971)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is CHALLNA free?

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

### Is SwitchPDF free?

SwitchPDF is free to download, with in-app purchases available.

### Do CHALLNA or SwitchPDF have ads?

SwitchPDF shows ads; CHALLNA does not.

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

CHALLNA ships an update every 2 weeks, and SwitchPDF every 2 weeks. Most recently, CHALLNA was updated on October 31, 2026 and SwitchPDF on October 29, 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.*