WFS300 vs Arrk
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
WFS300
This application simplifies vehicle security by allowing your iPhone to act as a key. Simply enable the phone-tag feature, and your car will automatically disarm when your iPhone is nearby, even when in sleep mode. All communication is encrypted for enhanced security.
- Automatic vehicle disarming
- iPhone as a key
- Encrypted communication
- No PIN code required
- Works in sleep mode
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The AMPIRE WFS300-BT is a unique immobilizer that uses the latest technology to secure your vehicle. To make security even easier we have added this special application for your iPhone that allows you to just get in the car and drive. No need to use your immobilizer PIN code to disarm the AMPIRE WFS300-BT. Just enable this phone-tag and as soon as your iPhone is near your car you will be able to drive, even if your iPhone is in sleep mode in your pocket. All communication is encrypted and secure.
Arrk
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Arrk is a native iPhone app for your Radarr and Sonarr servers. Browse your library, add missing titles, choose releases and track downloads without opening a browser. ⢠Connect directly to your servers over local Wi-Fi or a VPN such as Tailscale. No Arrk account and no cloud relay. ⢠Server addresses and API keys stay securely in your iPhone keychain. ⢠Automatic discovery finds Radarr and Sonarr on your network, so you do not need to look up IP addresses or ports. ⢠See upcoming movies and episodes from every server in one calendar, grouped by date, with premieres and finales highlighted. ⢠Browse each library as a fast poster grid or compact list, with search, sorting and filters for available, missing and monitored titles. ⢠See artwork, cast, ratings, seasons and files together on clear, detailed pages. ⢠Add titles using your existing quality profiles and root folders, or search releases manually and compare quality, size and seeders. ⢠Organise your library with Radarr and Sonarr tags: tag titles from their detail page or while adding them, and tidy up unused tags in server settings. ⢠View both queues on one screen, follow progress in real time and get notified when a download finishes. Server health and free disk space are always close at hand. ⢠Search your history of grabs, imports and failures, with the tools you need to deal with anything that gets stuck. ⢠Make it yours with an accent colour, light or dark mode, haptics and animations. Available in English, Italian, Spanish, German and French. Arrk requires a Radarr and/or Sonarr installation that your iPhone can reach over local Wi-Fi or VPN.
Screenshots
Verdict
The clearest difference is update cadence: Arrk at every 5 days against WFS300's every 3 months. WFS300's advantage is iOS requirement (8.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
WFS300 ships an update every 3 months, Arrk every 5 days. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | WFS300 | Arrk |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 31.3% of reviews | ā |
| Update frequency | Every 3 months | Every 5 days ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | ā |
| Devices | iPhone, iPod ā better | iPhone |
| Requires iOS | 8.0 ā better | 16.4 |
| Further details ā not scored | ||
| Size | 14 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Ampire | Alessandro Mazzon |
In-app purchases
WFS300
No in-app purchases
Arrk
No in-app purchases









