Zenn OTP vs Kale Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zenn OTP
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This application generates one-time passwords for devices and services which developed by Zenn.
Kale Smart
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Manage your lock with your phone
Screenshots
Verdict
The clearest difference is update cadence: Zenn OTP at every 6 weeks against Kale Smart's every 18 months. Kale Smart's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, 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.
Zenn OTP ships an update every 6 weeks, Kale Smart every 18 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Zenn OTP | Kale Smart |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPod, Apple Watch — better |
| Requires iOS | 16.4 | 13.0 — better |
| Further details — not scored | ||
| Size | 32 MB | 414 MB |
| Age rating | 4+ | 4+ |
| Developer | Zenn | Kale Kilit |
In-app purchases
Zenn OTP
No in-app purchases
Kale Smart
No in-app purchases
