Calculator Pro+ - Private SMS
Communication
1 Million+ installs
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- CategoryCommunication
- PlatformAndroid
- DeveloperPrivate SMS Box
- In-app PurchasesYes
- Installs1 Million+
- Updated2026-09-28
- Size28 M
- Version4.2.157
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Editor's Review
Calculator Pro+ - Private SMS comes from Private SMS Box and is listed under the Communication category on Google Play. The developer sums it up as: "Hide private SMS & in-app calls inside a real working calculator. Secure vault." It has passed 1 Million+ installs, and users rate it 4.4 out of 5 across 4.7K ratings. The latest version (4.2.157) was released on 2026-09-28, so the app is still being actively updated. Good to know: it offers optional in-app purchases and needs about 28 MB of storage.
How To Use?
Calculator Pro+ — The Calculator That Keeps Your Private Life Private
Hidden Inside A Real Calculator
Multi-Layer Security
PIN lock & fingerprint unlock
Fake PIN — decoy shows empty inbox to anyone who asks
Google Play
Description
🔢 CALCULATOR PRO+ — THE CALCULATOR THAT KEEPS YOUR PRIVATE LIFE PRIVATE
Calculator Pro+ looks and works like a normal calculator. Enter your secret PIN on the keypad and unlock a completely hidden world — private SMS, in-app calls, chats and media, invisible to everyone else.
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🧮 HIDDEN INSIDE A REAL CALCULATOR
Dial your secret PIN on the keypad to open your private vault — no swipes, no obvious unlock screens. To everyone else, it's just a calculator that really calculates.
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🔒 MULTI-LAYER SECURITY
• PIN lock & fingerprint unlock
• Fake PIN — decoy shows empty inbox to anyone who asks
• Auto-lock on screen off or idle timer
• Shake-to-close for instant privacy in public
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💬 PRIVATE MESSAGING — TWO WAYS
── Free App-to-App Messaging ──
When both sides use Calculator Pro+, messages travel over the app's own private network — no SMS, no carrier charges. Free over Wi-Fi or mobile data.
• Smart reply suggestions
• Disappearing messages — 1 hour to 3 months
• Delete for Everyone — both sides, instantly
── Hide Normal SMS & MMS (with our free AdvanceSMS app) ──
Read more
Android only lets your default SMS app hide text messages, so Calculator Pro+ works together with our free companion app, AdvanceSMS. Set AdvanceSMS as your default SMS app once — after that, messages from your private contacts go straight into the Calculator Pro+ vault and never show up in your phone's normal inbox. Replies go out as normal SMS, with no sign you are using a hidden app. ━━━━━━━━━━━━━━━━━━━━━━━━━━ 📞 IN-APP VOICE & VIDEO CALLS Voice and video calls between Calculator Pro+ users over the internet — no carrier minutes, no native call log trace, no SIM required. Full-screen incoming call even on a locked screen. Bluetooth and speakerphone supported. ━━━━━━━━━━━━━━━━━━━━━━━━━━ 📵 SMS & CALL BLOCKER Block unwanted contacts silently through the app. All blocked activity logged privately inside your vault. ━━━━━━━━━━━━━━━━━━━━━━━━━━ ☁️ GOOGLE DRIVE BACKUP & RESTORE Auto-backup on a daily, weekly or monthly schedule. Restore everything in one tap when you switch phones or reinstall the app. Local backup to device storage also supported. ━━━━━━━━━━━━━━━━━━━━━━━━━━ 📱 VIRTUAL NUMBERS Buy a temporary number inside the app and contact anyone without revealing your real phone number. ━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎨 FULL CUSTOMISATION Wallpaper themes, colour themes, dark mode, custom bubble colours, fonts, per-contact ringtones, wallpapers and 300+ emoji. ━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ WHY CALCULATOR PRO+ ✔ Real working calculator — zero suspicion ✔ Fake PIN decoy inbox ✔ Free app-to-app internet messaging — no carrier charges ✔ VoIP calls — no native call log trace ✔ Disappearing messages & Delete for Everyone ✔ Normal SMS/MMS hidden via free AdvanceSMS companion app ✔ Google Drive auto-backup & one-tap restore ✔ Virtual numbers to mask your real phone number ━━━━━━━━━━━━━━━━━━━━━━━━━━ ⭐ UPGRADE TO PRO Go ad-free and unlock premium themes, custom bubble styles and unlimited colour and font customisation — available as an auto-renewing subscription. ━━━━━━━━━━━━━━━━━━━━━━━━━━ ℹ️ GOOD TO KNOW • Hiding the app icon: on Android 9 and below you can hide the icon completely and open the app through a secret browser link. On Android 10 and above, Android requires the icon to stay visible — it simply appears as a normal calculator. • Hiding normal SMS requires the free AdvanceSMS app set as your default SMS app. App-to-app messaging and calls work without it. ━━━━━━━━━━━━━━━━━━━━━━━━━━ 📲 Download Calculator Pro+ — the messaging app that doesn't look like one.Screenshots
4.4