Scan vs LiquidSpring
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Scan
Easily manage Whelen flash patterns for compatible lightheads using your phone. Browse, test, and assign patterns wirelessly via Bluetooth with a required programmer.
- Browse and assign flash patterns
- Test patterns up to 20 seconds
- Access steady pattern option
- Bluetooth connectivity
- Supports compatible Whelen lightheads
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Scan-Lock+ is the simplest way to change Whelen flash patterns. Designed for optimal convenience, Scan-Lock+ features an easy to use interface and utilizes a Bluetooth connection. Download the Scan-Lock+ app and browse, test, and assign Whelen flash patterns right from your phone. Key Features Scroll and Update Flash Patterns Using a Scan-Lock+ Programmer, pair any compatible Whelen lighthead with the Scan-Lock+ app and easily browse, test, and assign flash patterns. Test Flash Patterns Preview any flash pattern for up to 20 seconds. Easily Access the Steady Pattern Enable the steady option right from the top of the flash pattern list. Bluetooth Connectivity The Scan-Lock+ app communicates to a Scan-Lock+ Programmer via Bluetooth connection. Supported Whelen Lightheads Compatible with any Whelen lighthead that supports Scan-Lock+ or the original Scan-Lock. A Scan-Lock+ Programmer is required to use this app. See more at www.whelen.com/scanlockplus
LiquidSpring
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This is the LiquidSpring Display application allowing connection to the Bluetooth enabled Display module connected to your LiquidSpring system!
Screenshots
Verdict
The clearest difference is update cadence: Scan at every 3 weeks against LiquidSpring's every 4 months. Scan also leads on iOS requirement (8.0 vs 14.2). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Scan ships an update every 3 weeks, LiquidSpring every 4 months. The most recent releases landed on September 23, 2026 and October 1, 2026 respectively.
| Parameter | Scan | LiquidSpring |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 14.2 |
| Further details — not scored | ||
| Size | 41 MB | 78 MB |
| Age rating | 4+ | 4+ |
| Developer | Whelen Engineering Co. | LiquidSpring |
In-app purchases
Scan
No in-app purchases
LiquidSpring
No in-app purchases
