e vs Smart Protractor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
e
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e-CUBE redefines the way people think about Internet of Energy & IoT service. e-CUBE is designed to provide a smart, satisfied and safe service in your daily life. News feed delivers upgraded experience to easily manage your electricity data. The UI card design helps you control smart home appliances with a single tap on your smartphone. e-CUBE is not just a HEMS (Home Energy Management System). e-CUBE provides useful insights for greater energy savings and dozens of advanced IoE services for your family, making your life easier and safer.
Smart Protractor
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A simple and accurate tool for measuring angles right on your iPhone. With camera support and image import, you can easily overlay a virtual protractor on real-world objects or photos. Zoom, rotate, and pan with intuitive gestures to get the exact view you need. Whether you’re tackling DIY projects, woodworking, or academic tasks, this app helps you find precise angles quickly and easily. Features: - Import and overlay images for easy angle measurement - Multi-touch controls for zoom, rotation, and panning - Clean, user-friendly interface designed for quick use on the go Perfect for anyone who needs reliable and precise angle measurement anytime, anywhere.
Screenshots
Verdict
The clearest difference is in-app purchases: e at none against Smart Protractor's 2. e also leads on iOS requirement (13.0 vs 17.2). On price, update cadence, 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
Both are free to download. Smart Protractor sells 1 one-off in-app purchase. e asks for nothing beyond the download.
e ships an update fortnightly, Smart Protractor every 2 weeks. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.
| Parameter | e | Smart Protractor |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 84 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | NextDrive Co. | Jun Yamabe |
In-app purchases
e
No in-app purchases
Smart Protractor
- Remove Ads2 variants$2.99
