Comparison

Subnet Calculator + vs Quantum Shield

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

Head to head
About

Subnet Calculator +

This utility app simplifies network calculations for professionals and students. It offers tools for IPv4 and IPv6 subnetting, including live CIDR sliders and subnet splitting. Results can be easily shared or copied.

Highlights
  • IPv4 subnet calculator with CIDR slider
  • Subnet Splitter for VLSM
  • IPv6 calculator with prefix slider
  • Auto-detect device IP from Wi-Fi
  • Navigate adjacent subnets
  • Share or copy results
  • Native Mac support
Features
Read full description

SubnetCalc is a fast, intuitive subnet calculator for networking professionals and students. Features: - IPv4 subnet calculator with live CIDR slider (1-30) - Subnet Splitter for equal-split and VLSM subdivision - IPv6 calculator with prefix slider (1-128) - Auto-detect your device's IP and subnet from Wi-Fi - Navigate between adjacent subnets - Share or copy results instantly - Native Mac support via Mac Catalyst Enter any IP address, adjust the CIDR prefix with the slider, and instantly see: - Subnet mask - Network address - Broadcast address - Usable host range - Maximum hosts - Wildcard mask The Subnet Splitter lets you divide a network into equal subnets or use VLSM to allocate subnets by host count. Perfect for network planning and design. No ads. No tracking. No subscription.

About

Quantum Shield

Features
Read full description

Before you reply, make a payment, or click a link, check it out. Quantum Shield helps you detect signs of a potential scam in messages, links, images, audio files, and screenshots. Share or upload any content that makes you suspicious, and get a clear assessment so you can decide what to do next with greater peace of mind. You can use Quantum Shield to check: * Suspicious SMS and WhatsApp messages * Emails asking for personal information, payments, or codes * Links that might lead to fake websites * Screenshots of conversations or ads * Images and audio files with possible signs of fraud Quantum Shield analyzes known fraud patterns and shows you potential red flags, explained in simple terms. It does not replace your own judgment or legal or financial advice. In an urgent situation or if you suspect fraud, also contact your bank, platform, or the relevant institution. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage them in your App Store account settings after purchase. Terms of Use (EULA): https://qshield.es/terminos Privacy Policy: https://qshield.es/privacidad

Screenshots

Subnet Calculator +3 screens
Quantum Shield4 screens

Verdict

The call

The clearest difference is update cadence: Quantum Shield at every 4 days against Subnet Calculator +'s every 64 months. Quantum Shield also leads on iOS requirement (13.0 vs 18.6). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Subnet Calculator + sells 4 one-off in-app purchases and Quantum Shield sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Subnet Calculator + ships an update every 64 months, Quantum Shield every 4 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Subnet Calculator + versus Quantum Shield: the parameters behind the verdict, then further details
ParameterSubnet Calculator +Quantum Shield
PriceFreeFree
Rating4.0 (7 ratings) — better—
Positive reviews52.9% of reviews—
Number of ratings7 — better—
Update frequencyEvery 64 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS18.613.0 — better
Further details — not scored
Size1 MB24 MB
Age rating4+4+
DeveloperSteven EpplerQuantum Secure Labs SL

In-app purchases

4 purchases

Subnet Calculator +

One-time4
  • Small Tip$0.99
  • Medium Tip$1.99
  • Large Tip$4.99
Show 1 more
  • Huge Tip$9.99
4 purchases

Quantum Shield

Subscriptions4
  • Plus Mensual$3.991 Month
  • Shield Mensual$8.991 Month
  • Plus Anual$25.001 Year
Show 1 more
  • Shield Anual$69.001 Year

Questions

Is Subnet Calculator + free?
Subnet Calculator + is free to download, with in-app purchases available.
Is Quantum Shield free?
Quantum Shield is free to download, with in-app purchases available.
Do Subnet Calculator + or Quantum Shield have ads?
Neither Subnet Calculator + nor Quantum Shield shows ads.
Which is updated more often, Subnet Calculator + or Quantum Shield?
Subnet Calculator + ships an update every 64 months, and Quantum Shield every 4 days. Most recently, Subnet Calculator + was updated on October 27, 2026 and Quantum Shield on October 24, 2026.

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