Comparison

SF Security vs Quantum Messages

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SF Security

Features
Read full description

This APP is use for Shan Feng remote control. 1.You can use the APP control you car alarm 2.It can read the car battery pack voltage 2.The remote control and iPhone can combine anti-lost

About

Quantum Messages

Features
Read full description

Quantum Message is an innovative proximity communication tool. Leveraging your smartphone's built-in speakers and microphones, it enables fast, private text messaging between devices, completely independent of traditional networks (Wi-Fi, cellular data, or Bluetooth). Think of it as your covert ops toy! Discover clever tricks to boost your range – from 1 meter to an impressive 100 meters. How far can you push it? Experiment freely with quirky scenarios and share your adventures with us! Key Features: Offline Messaging: Exchange texts in no-signal or congested areas: - Basements - Airplanes (hardware boosters may extend range) - Remote regions - Crowded events - Secure facilities Instant Proximity Transfer: Zero-Configuration Connection: Send instantly – no pairing, scanning, or contacts needed. Near-Real-Time Delivery: Short texts relay swiftly within effective range. Localized Reach: Messages only appear to QMsg users within your immediate physical vicinity. Device-to-Device: Data travels directly between phones, bypassing external servers/cloud. Enhanced Security: Optional end-to-end password protection for sensitive texts.

Screenshots

SF Security1 screens
Quantum Messages3 screens

Verdict

The call

The clearest difference is in-app purchases: SF Security at none against Quantum Messages's 1. SF Security also leads on iOS requirement (8.0 vs 17.0). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Quantum Messages sells 1 one-off in-app purchase. SF Security asks for nothing beyond the download.

Scorecard2 real differences · 4 level
SF Security versus Quantum Messages: the parameters behind the verdict, then further details
ParameterSF SecurityQuantum Messages
PriceFreeFree
Update frequencyEvery 6 weeks—
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS8.0 — better17.0
Further details — not scored
Size5 MB2 MB
Age rating4+4+
DeveloperåĢŪ éŧ„å˜‰čƒœ 陈

In-app purchases

None

SF Security

No in-app purchases

1 purchases

Quantum Messages

One-time1
  • Pro$19.99

Questions

Is SF Security free?
SF Security is free to download, with no in-app purchases.
Is Quantum Messages free?
Quantum Messages is free to download, with in-app purchases available.
Do SF Security or Quantum Messages have ads?
Neither SF Security nor Quantum Messages shows ads.

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