IAMMETER vs KeyShelf
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
IAMMETER
Monitor your home's electricity consumption in real-time. Track energy flow, grid import/export, and solar PV production. Integrate with popular home automation systems.
- Real-time electricity usage tracking
- Monitor energy flow
- Solar PV system production monitoring
- Grid import/export tracking
- Home automation integration
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This app is a tool of IAMMETER (https://www.iammeter.com), an online energy monitoring system developed by us. By installing our WiFi energy meter and running this app, you can 1. Track your home electricity usage in real-time. To learn more, please visit https://www.iammeter.com/doc/iammeter/residential_electricity_system.html; 2. Monitor the entire energy flow, the energy imported from/exported to grid and solar PV system production, for you solar PV system. To learn more, please visit https://www.iammeter.com/doc/iammeter/monitor-your-solar-system.html; 3. Integrate with some Home Automation system, such as Home Assistant, openHAB, NodeRED, etc. To learn more, please visit https://www.iammeter.com/doc/iammeter/home_automation.html. To buy our WiFi energy meters, please visit our Aliexpress Store https://devicebit-iot.aliexpress.com. For more details, please visit https://www.iammeter.com Customer Support: Email: support@devicebit.com Mobile: +86 13911890238
KeyShelf
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KeyShelf is a private inventory for every physical key you own. Photograph both sides, write down what it opens, tag it, and never stand in front of a lock guessing again. Add a key in seconds: front and back photos, a color and head-shape quick-pick for keys without photos yet, the place its lock lives, and what exactly it opens. From there the shelf does what a junk drawer never will: instant search that ignores accents and looks through names, descriptions, places, tags, and even the people holding copies. Keys get copied, and copies wander. KeyShelf tracks every copy: who has it, since when, a note, and a lent-out flag that stays on the key until the copy comes home. The People screen flips the question around and shows every holder and exactly which of your keys they carry. WHAT YOU GET - Key inventory: front and back photos for every key, in a clean shelf grid - What it opens: a plain-words description plus a structured place (home, cottage, office, mailbox, padlock, vehicle, and more) - Tags and instant smart search: accent-insensitive, across names, descriptions, places, tags, and copy holders - Copy tracking: every copy with its holder, note, hand-over date, and a lent-out flag - People: everyone who holds a copy, and which keys they have - Private Face ID lock: optional, with your device passcode as fallback - Printable key registry PDF: a clean table grouped by place, photo thumbnails optional, with copy holders and lent flags - Syncs across iPhone, iPad, and Mac with iCloud FREE AND LIFETIME Free covers a full shelf of 12 keys with photos, search, tags, copy tracking, and the Face ID lock. Lifetime is a single purchase that unlocks unlimited keys and the printable registry PDF, forever. No subscription. PRIVATE BY DESIGN No account of ours and no tracking. Your keys live on your device and in your private iCloud, which we cannot read. An optional Face ID lock keeps the shelf closed to anyone but you, and Settings has a Delete All My Data control that erases everything from your device and your iCloud. PRICING KeyShelf Pro is a one time Lifetime purchase of $12.99 USD. Payment is charged to your Apple Account at confirmation of purchase. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: KeyShelf at every 9 days against IAMMETER's every 6 weeks. IAMMETER's advantage is iOS requirement (15.6 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
IAMMETER ships an update every 6 weeks, KeyShelf every 9 days. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.
| Parameter | IAMMETER | KeyShelf |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | โ |
| Update frequency | Every 6 weeks | Every 9 days โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | โ |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 15.6 โ better | 18.0 |
| Further details โ not scored | ||
| Size | 12 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing Lewei IoT Technologies Co.,Ltd. | InnovaLabWorks |
In-app purchases
IAMMETER
No in-app purchases
KeyShelf
No in-app purchases









