Simple Subnet Calc vs TrustOTP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple Subnet Calc
This utility quickly calculates IPv4 and IPv6 subnets with a clean interface. It's designed for network professionals and students needing fast, accurate subnetting tools on their iPhone.
- IPv4 subnetting
- IPv6 subnetting
- Clean interface
- Ad-free experience
- Designed for professionals
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Simple Subnet Calculator — Fast, Clean, and Built for Pros Simple Subnet Calculator is your go-to tool for quick and accurate subnetting on iPhone. Whether you’re working with IPv4 or IPv6, this app gives you the essentials in a clean and intuitive interface—no ads, no clutter, no distractions. Designed with network engineers, sysadmins, IT professionals, and students in mind, it delivers what you need, when you need it—on the go, in the lab, or on the job.
TrustOTP
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TrustOTP is a privacy-first, offline TOTP authenticator built to protect your accounts with secure two-factor authentication (2FA). Generate fast and reliable one-time passwords (OTP) without relying on cloud storage or external servers. PRIVACY BY DESIGN • No account required • No cloud sync or backups • Your secrets never leave this device • Anonymous analytics via TelemetryDeck (optional) FEATURES • Scan QR codes or enter secrets manually • Support for SHA1, SHA256, and SHA512 algorithms • Fast 6-digit OTP code generation • Clean and simple interface • Fully offline authentication • Lightweight and secure PERFECT FOR • Developers • IT professionals • Security-conscious users • Anyone who values privacy and control TrustOTP is designed with transparency, security, and simplicity in mind to help keep your digital accounts safer every day. IN-APP PURCHASE TrustOTP offers a one-time purchase to remove ads and unlock a cleaner experience. • Remove Ads (Lifetime Purchase) Payment will be charged to your Apple ID account at confirmation of purchase. This is a one-time payment and does not renew automatically. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Simple Subnet Calc at none against TrustOTP's 2. Simple Subnet Calc also leads on ads (none vs shown) and iOS requirement (18.0 vs 26.2). TrustOTP's advantage is update cadence (every 3 weeks vs every 6 months). On price 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. TrustOTP sells 2 in-app purchases, starting at $2.99 per month. Simple Subnet Calc asks for nothing beyond the download.
Simple Subnet Calc ships an update every 6 months, TrustOTP every 3 weeks. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.
| Parameter | Simple Subnet Calc | TrustOTP |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 60.9% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 18.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 1 MB | 13 MB |
| Age rating | 4+ | 17+ |
| Developer | Diogo Andre Assumpcao | Jean Delio Candio |
In-app purchases
Simple Subnet Calc
No in-app purchases
TrustOTP
- All Access$2.991 Month
- All Access$19.991 Year
Questions
Is Simple Subnet Calc free?
Is TrustOTP free?
Do Simple Subnet Calc or TrustOTP have ads?
Which is updated more often, Simple Subnet Calc or TrustOTP?
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