SAJ vs smart LK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SAJ
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Calibration App for SAJ-DMS draft survey. Can only be used by customers with SAJ-DMS system/license.
smart LK
Control your smart lock remotely with this app. It supports unlocking via password and offers security alerts for brute-force attempts on fingerprint locks, ensuring property safety.
- Remote unlocking
- Password lock support
- Brute force crack alerts
- Property safety notifications
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Welcome to use our company's smart lock. This App needs to be used with our company's smart lock Supports App remote unlocking, password lock and other unlocking methods. When the fingerprint lock finds that there is a brute force crack, it will send a message to the user to ensure the safety of the user's property.
Screenshots
Verdict
The clearest difference is update cadence: smart LK at monthly against SAJ's every 23 months. SAJ's advantage is iOS requirement (8.0 vs 11.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
SAJ ships an update every 23 months, smart LK monthly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | SAJ | smart LK |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 23 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 152 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | SAJ Instrument Ab | libing yang |
In-app purchases
SAJ
No in-app purchases
smart LK
No in-app purchases
