Ruler vs Cloud Smart Lock App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ruler
This utility app uses augmented reality to measure lengths and areas in the real world. Simply point your device's camera to get accurate measurements.
- Augmented reality measurement
- Measure length
- Measure area
- Simple interface
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A simple AR ruler for length and area measurements.
Cloud Smart Lock App
Manage and operate your smart door lock from the cloud. Features include one-key unlocking, sharing access via QR codes, and automatic unlocking. View lock status and access unlock history.
- Add and manage door locks
- One-key unlocking
- QR code sharing for access
- Automatic unlocking
- View lock status
- Unlock history records
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This is an intelligent door lock App, which realizes the management and operation of cloud smart door lock. Its main functions include adding and managing door locks, unlocking by one key, unlocking by two-dimensional code sharing, automatic unlocking, and viewing the status of unlocking, unlocking records and other information.
Screenshots
Verdict
The clearest difference is review sentiment: Ruler at 100% against Cloud Smart Lock App's 75%. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Ruler ships an update every 3 months, Cloud Smart Lock App every 2 months. The most recent releases landed on October 22, 2026 and October 2, 2026 respectively.
| Parameter | Ruler | Cloud Smart Lock App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews — better | 75.0% of reviews |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 22 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Play, Inc. | 明毅 龚 |
Customer experience
Ruler
Cloud Smart Lock App
In-app purchases
Ruler
No in-app purchases
Cloud Smart Lock App
No in-app purchases
Questions
Is Ruler free?
Is Cloud Smart Lock App free?
Do Ruler or Cloud Smart Lock App have ads?
Which is updated more often, Ruler or Cloud Smart Lock App?
Other comparisons
