Free iPhone ring sizer app: measure a ring on screen, measure finger width, convert US, UK, EU, JP and letter sizes, and save sizes in seconds.
5.84k+ downloads · 4.8 stars
Updated iPhone interface
The updated app keeps ring measurement, finger measurement, conversion, and saved sizes cleanly connected.
Measure a ring, measure a finger, convert standards, and save sizes without visiting a jeweler.
Ring Measurement
Place a ring on the circle and adjust the guide until the inner edge matches.
Saved Sizes
Keep important ring sizes ready for yourself, family, partners, and gift planning.
Global Size Standards
Convert between US, UK, EU, Japan, Australia, India, and millimeter measurements.
Finger Width Mode
No ring? Measure your finger directly across the on-screen bar and fine-tune the millimeter value.
Offline & Private
Works fully offline. Your data never leaves your device. Zero tracking.
Instant Results
Your size appears immediately in all major standards — US, UK, EU, and more.
Engagement Ready
Planning a surprise proposal? Secretly measure a ring while they're away.
Size History
Track how your ring size changes over time with measurement history.
Clean iPhone UI
Large controls, clear rulers, and focused sheets make each sizing task easy to follow.
Use our free online tool. No download needed.
Step 1: Calibrate Your Screen
Place a standard credit card on your screen for pixel density calibration.
Place your ring on the screen and drag the handles to match its inner edge.
Your Ring Size
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US Size
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UK Size
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EU Size
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Japan Size
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Diameter (mm)
Tip: Calibrate your screen with a credit card first for maximum accuracy. Want size history, family profiles, and advanced features? Download the app.
A standard credit card is 85.6mm wide. Drag the handles to match your card's width exactly.
No jeweler visit. No guesswork. Just your phone.
Choose a Mode
Measure an existing ring on the circle, or switch to finger width mode when no ring is available.
Align the Guide
Use the ruler, slider, and plus/minus controls to match the ring or finger width precisely.
Save or Convert
See the measurement instantly, save it for later, or convert it between international standards.
Buy jewelry anywhere in the world with confidence.
US
& Canada
UK
& Australia
EU
Europe
JP
Japan
IN
India
mm
Diameter
Ring Sizer works entirely offline. Your measurements never leave your device. We don't collect, share, or sell any of your data. Ever.
"Used this app to measure ring size. It's accurate and it's really helpful."
Pradep12 · App Store Review
The "Key" file is the most critical component. It is usually located at: /data/data/com.whatsapp/files/key
Stores the names, phone numbers, and directory info of your contacts. Caches small preview images for sent and received media. Important Security and Privacy Considerations
WhatsApp uses a rolling encryption standard to protect your local backups. The .crypt14 extension represents one of the latest iterations of this security.
For developers or individuals with the right permissions, accessing WhatsApp's database involves working with encrypted data. WhatsApp's database stores messages, media, and other information in an encrypted form.
Contains the actual chat text, sender/receiver JIDs, and timestamps. whatsapp+db+crypt14+viewer+hot
Then open msgstore.db with any SQLite browser.
Let me know, and I’ll provide details strictly for ethical security research.
A “WhatsApp + crypt14 + viewer + hot” write-up points to the current forensic challenge of decrypting modern WhatsApp databases. While viewer tools exist, they require direct device access or root. “Hot” trends often revolve around new bypass techniques — but none work on fully patched, locked Android 13+ devices without the user’s passphrase.
To convert a raw .crypt14 file into readable text or an open SQLite database, you must obtain its unique cipher key. The key is an unencrypted 158-byte file stored locally on the device. The "Key" file is the most critical component
“Viewer” tools automate:
WhatsApp automatically generates local backups every night on Android devices. These files are stored in the internal memory directory: /Android/media/com.whatsapp/WhatsApp/Databases/ . CYRPT14 - FIle Extension Wiki
If you have a legitimate reason to view a Crypt14 file (e.g., you accidentally deleted a chat and have an old msgstore.db.crypt14 backup from Google Drive), here is the current working method (as of mid-2025).
For advanced users, various GitHub repositories provide Python scripts that can take the key and the encrypted database to output a standard .db (SQLite) file. Step-by-Step Decryption Process it is a file extension
Here is a look at what these files are and the current "hot" methods used by developers and forensic experts to view them on a PC. What is a .crypt14 File?
View dates, timestamps, and text messages in a clean interface.
At the heart of the query lies the term "Crypt14." To the layperson, it is a file extension; to the engineer, it is a battleground.
Even when working with your own data, be aware that exporting your chat history may contain sensitive information about other individuals. Treat the decrypted data with the same care you would treat any private conversation.
Export conversations into readable formats like PDF, HTML, or CSV.
Guides, tools, and charts to help you find the perfect fit.
Ring Size Chart
Complete conversion chart for US, UK, EU, Japan, and Australian ring sizes with diameter in mm.
How to Measure Ring Size at Home
5 free methods to find your ring size without visiting a jeweler — app, string, paper strip, and more.
Ring Size Calculator
Enter your ring diameter or circumference to instantly find your size in every international standard.
UK Ring Sizes (A–Z)
British letter-based sizing guide with full chart, Hatton Garden tips, and UK to US conversion.
Men's Ring Size Guide
Average men's ring sizes, measurement tips, and a complete chart for wedding bands and signet rings.
Secret Engagement Ring Sizing
How to find your partner's ring size without them knowing — clever tips for surprise proposals.
Free to download. Works on iPhone. No tools needed.
