Paperlock vs Simmerdial
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Paperlock
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Paperlock is a locked drawer for the papers that matter. Your iPhone can already scan a page. Paperlock is where the scan goes afterwards, when it is something you would not leave lying around: a passport, a lease, a tax return, a medical record. LOCKED AND ENCRYPTED • Locks as soon as you leave it. Face ID, Touch ID or your passcode opens it again. • Every scan, PDF, name and note is encrypted with AES-256 before it is stored. • The key stays in your iPhone's Keychain, on this device only. YOUR PAPERS • Scan paper with the camera. Several pages become one PDF. • Import PDFs you already have. • Give each document a name and a note, and search through both. • Open a PDF, or share a copy when you choose. BACK UP ON YOUR TERMS • A backup is one encrypted file with its own password. • You decide where it goes. Paperlock does not upload it. • A vault password opens your documents on a new iPhone. PRIVATE BY DESIGN • No account, no cloud, no server, no analytics, no ads. • The app makes no network requests at all. GOOD TO KNOW • There is no password reset. Nobody else holds your key, so nobody can recover it for you. • There is no sync. Your documents are on one phone, and a backup file is how you move them. Paperlock was called Secure Document Vault. If you have it, this update keeps your documents and encrypts them the first time you open it.
Simmerdial
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Simmerdial brings a familiar kitchen timer to your iPhone. Turn the dial clockwise to set a time. Release to start. From eggs and tea to baking, set your timer and get back to the task at hand. A short illustrated guide walks you through the basics on first launch. TURN TO SET Choose up to 60 minutes in 15-second steps. Mechanical clicks and haptic feedback make each turn feel familiar. Mute the dial sound whenever you like. SEE WHAT IS LEFT The orange ring shows time remaining at a glance. Adjust the dial while the timer runs, tap to add five minutes, or reset to start over. HEAR WHEN IT IS READY Allow system alerts and, once the alarm is scheduled, it can ring when your iPhone is locked or the app is closed. Check the live countdown on your Lock Screen or in the Dynamic Island on supported iPhones. MAKE IT YOURS Choose light, dark, or your system appearance. Open iOS Settings from the app menu to change the app language. Available in English, Simplified Chinese, and Japanese. KEEP IT SIMPLE No account, ads, or tracking SDKs. Timer state, sound settings, and appearance preferences stay on your device. Timing works offline. VoiceOver lets you adjust the time, and Reduce Motion is supported. For iPhone with iOS 26 or later. System alerts require permission. If permission is off or an alarm cannot be scheduled, keep the app open to hear the alert. Dynamic Island features require a supported iPhone.
Screenshots
Verdict
The clearest difference is update cadence: Simmerdial at every 3 weeks against Paperlock's every 13 months. Paperlock's advantage is iOS requirement (18.5 vs 26.0). 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.
Paperlock ships an update every 13 months, Simmerdial every 3 weeks. Both last shipped on October 24, 2026.
| Parameter | Paperlock | Simmerdial |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 13 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone |
| Requires iOS | 18.5 — better | 26.0 |
| Further details — not scored | ||
| Size | 1 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | John Larson | 凯 邢 |
In-app purchases
Paperlock
No in-app purchases
Simmerdial
No in-app purchases









