SEM vs Iron Switch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SEM
This utility app monitors your household power consumption in real-time, providing historical data and comparisons to help you save on electricity bills. It supports managing multiple devices and customizing electricity fee calculations.
- Real-time power usage monitoring
- Historical energy use tracking
- Second-to-second, day-to-day, week-to-week, month-to-month, and year-to-year comparisons
- Electricity fee gradient calculation
- Customizable fee templates
- Multiple device management
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SEM‑Meter is a smart energy monitor that installs directly in your power distribution box. It continuously tracks your household electricity consumption and delivers real‑time usage data straight to you—so you always know exactly what’s drawing power. Beyond live monitoring, SEM‑Meter offers powerful insights to help you manage energy more intelligently: Historical analysis – Review past usage patterns and identify conservation opportunities. Multi‑timeframe comparisons – Compare consumption second by second, day by day, week by week, month by month, and year over year. Bill savings – With clear visibility into your habits, you can make informed changes that lower your monthly electricity costs. Customizable tariff calculator – Includes a built‑in electricity fee gradient template, fully adjustable to match your local rate structure. Multi‑device management – Add and bind multiple SEM‑Meters to a single account, enabling unified monitoring and control across multiple properties or expanded setups. Whether you're an eco‑conscious homeowner or managing a growing portfolio, SEM‑Meter gives you the data and flexibility to take full command of your energy future.
Iron Switch
Securely store encrypted digital assets like crypto keys and passwords. If you stop checking in, this app automatically delivers access to designated recipients, ensuring your digital legacy is protected.
- Encrypted vault for sensitive data
- Automated delivery to trusted recipients
- Customizable check-in intervals
- Zero-knowledge AES-256 encryption
- Face ID/Touch ID app lock
- Offline recovery kit
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Iron Switch is an encrypted dead man's switch app for protecting crypto recovery phrases, passwords, documents, and final messages—and delivering them to trusted recipients if you stop checking in. Store your most critical information—crypto recovery phrases, passwords, documents, and final instructions—encrypted on your device before it ever leaves your phone. If you're ever unable to check in, Iron Switch securely delivers access to the people you've chosen. Everything is encrypted with AES-256 on your device. Your keys are never sent to our servers in a usable form, so no one at Iron Switch—and no one who breaches our servers—can read your vault. Only you and the recipients you designate can unlock it. HOW IT WORKS • Add your sensitive files, keys, and notes to your encrypted vault. • Choose the recipients who should receive access, plus an optional secondary verifier for added protection. • Set your check-in schedule. As long as you check in, nothing is released. • If you go silent past your window, the switch activates and your designated recipients receive secure access—exactly as you planned. BUILT FOR PEACE OF MIND • Zero-knowledge, client-side AES-256 encryption • Dead man's switch with customizable check-in intervals • Multiple recipients and an optional secondary verifier • Face ID / Touch ID app lock • Two-factor authentication (TOTP) • Offline recovery kit—export a self-contained decryptor so you're never locked out, even if our servers disappear • Delete your account and all data at any time, right from the app IMPORTANT: Iron Switch is NOT a cryptocurrency wallet or exchange. It does not buy, sell, hold, or transact cryptocurrency. It stores your private keys and recovery phrases only as client-side-encrypted text—just like any other note or document in your vault. Iron Switch includes a free plan with real protection: a secure vault, your dead man's switch, and recipient delivery. Secure your digital legacy today—so the right information reaches the right people, exactly when it's needed. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Iron Switch at 5.0 against SEM's 3.4. Iron Switch also leads on update cadence (weekly vs every 2 weeks). SEM's advantage is in-app purchases (none vs 3) and ratings volume (11 vs 1). On price, ads, device support and iOS requirement 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. Iron Switch sells 3 in-app purchases, starting at $9.99 per month. SEM asks for nothing beyond the download.
Iron Switch holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: SEM has 11 ratings behind it against 1, so its average is the more settled of the two.
SEM ships an update every 2 weeks, Iron Switch weekly. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.
| Parameter | SEM | Iron Switch |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (11 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 37.5% of reviews | — |
| Number of ratings | 11 — better | 1 |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 31 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Hangzhou Dashi Wisdom Technology Co., Ltd. | Felipe Oliveira |
Customer experience
SEM
Iron Switch
In-app purchases
SEM
No in-app purchases
Iron Switch
- Operator Monthly7 Days trial$9.991 Month
- Commander Monthly7 Days trial$29.991 Month
- Legacy Lifetime$499.99









