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Ring Sizer: Risi

Ring Sizer: Risi

Find your partner's ring size

36 ratings
17 reviews
🔧 Utilities
🌟 Lifestyle
Free
In-App Purchases

Details

Released
October 16, 2024
Updated
October 28, 2026

Features

Developer

Axel Le Pennec
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Ring Sizer: Risi screenshot #1 for iPhone
Ring Sizer: Risi screenshot #2 for iPhone
Ring Sizer: Risi screenshot #3 for iPhone
Ring Sizer: Risi screenshot #4 for iPhone
Ring Sizer: Risi screenshot #5 for iPhone
Ring Sizer: Risi screenshot #6 for iPhone
iphone
iphoneDuo
ipad
🧾$2.99 - $99.99
In-App Purchase↘︎
⭐17
Reviews↘︎
📝1+ tags
Tags↘︎
🔄6+ apps
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❓8 answered
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📦~ in 6 days
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About

Easily determine the perfect ring size from home. Measure fingers or existing rings with precision and convert sizes across international standards. Ideal for online shoppers and gift-givers.

✓Measure ring diameter and circumference
✓Measure finger width
✓International size conversions
✓Save and share measurements
✓Metric and imperial units
Show original description
+2

What's New in Ring Sizer

2026.14

October 28, 2026

Thanks for using the app! We’ve listened to your feedback and polished a few things to make your experience even smoother. What’s new in this version: • Full support for iPhone Duo • Performance optimizations for a faster experience • General bug fixes and stability improvements Recently introduced: • Full support for iOS 27 and iPadOS 27 • Now available in 36 languages! (If you spot a translation error or want your language added, feel free to drop me a line) Enjoying the app? A quick rating or review on the App Store makes a huge difference and really helps support independent development! Have questions, feedback, or ideas? Send me an email—I’d love to hear from you. – Axel

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6

Subscriptions & In-App Purchases

Weekly

All Plus features for a week

$6.997 Days
How to cancel Ring Sizer subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Lifetime is fake.

Got the lifetime plan for free a few months ago but now the app nags you to subscribe if you want to use it.
DDeservedReviews

Response from developer

Edit 2026-06-28: do you still have the issue? Please contact me by email directly so I can assist you. Hello DeservedReviews and thank you for your message. I’m sorry to hear that you’re having difficulties restoring the lifetime plan you got for free. The good news is there is a mechanism in all apps that is called “restoring purchases” you can use when you reinstall an app or install it on another device connected to the same App Store account. When you see the paywall in the app, scroll down at the bottom and hit the “Restore Purchases” button. Your lifetime plan will be restored if you unlocked it earlier. Please contact me by email if this doesn’t work so I can better assist you. If the solution works, can you please update this rating and review to reflect that? Let me know! Thank you, regards. Axel

Fantastic App

This ring sizer is extremely easy to use and actually works! It’s been accurate for several different rings I have tried and you can save the sizes in the app which is incredibly useful. It’s literally the app I didn’t know I needed. Highly recommended ⭐️⭐️⭐️⭐️⭐️
TThis.is.the.wayyy

Response from developer

Thank you so much for the amazing review! 🤩 I’m thrilled to hear that my app has been accurate and easy to use for you—that’s exactly what I hoped to achieve. It means a lot to know it’s become one of those unexpected but super useful tools for you. If you ever have ideas for new features or ways we can make the app even better, I’d love to hear them! - Axel

Excellent app!

Very accurate and saves time trying to figure out where that soft tape measure is. Totally recommend. Simple so that's worth keeping as part of your things inn your pocket or purse. Excellent job! I have a few other apps on long this longer if you're interested. Would love to collaborate if possible. Thanks again!

GREAT DEVELOPER!
Show more
RReptevye

Response from developer

Thank you so much for the fantastic review! 🤩 I’m really glad to hear that Ring Sizer has saved you time and earned a spot among your everyday essentials. Keeping it simple and accurate has been a top goal, so it means a lot to know that’s working for you. Feel free to reach out with any ideas or suggestions! - Axel

Good app

great app and very responsive developer.
Toutes les dimensions sont disponibles.
Je recommande.
Merci au développeur
SSSLIME SNAKE

Response from developer

De rien ! Merci beaucoup pour le commentaire. Je suis super content que l'application vous plaise. Je reste disponible si vous avez la moindre question ou suggestion d'amélioration. - Axel

Great app if you are in the jewelry business

Makes dealing with conversions from the standard US ring sizes to all international standards a breeze. I use this on a daily basis for my company, which is a jewelry B2B.
PPeleas22

Response from developer

Thank you for your wonderful review! I'm so glad to hear that my app is making international ring size conversions easy for you, especially in your jewelry business! It’s great to know it’s a useful tool for your daily work. If you ever have any suggestions or need additional features, I’d love to hear from you. - Axel

See 12 more reviews

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FAQ

How accurate is Risi for measuring ring sizes?

Risi offers the same precision as a professional jeweler, allowing you to measure the diameter or circumference of a ring with accuracy. This helps eliminate the fear of choosing the wrong size when shopping online.

Can Risi measure finger sizes directly?

Yes, Risi can accurately measure finger width, which is perfect for situations where you don't have a ring on hand to measure. This feature ensures you can still find the correct size.

Does Risi support international ring size conversions?

Absolutely. Risi seamlessly converts sizes between popular global sizing systems, including US/CA/MX, UK/AU/NZ, EU/ISO, and JP/CN, while maintaining accuracy.

How does Risi handle measurements for others?

You can easily measure fingers or rings for yourself, a friend, a family member, or anyone special. The app allows you to save and share these measurements for easy reference or to send to jewelers.

What is the pricing model for Risi?

Risi is free to download and use. To unlock all features and functionality, a one-time in-app purchase is available for lifetime access, with no subscription required.

What devices does Risi support?

Risi is available for iPhone and iPad, making it accessible to a wide range of Apple users. The app was last updated on October 28, 2026.

What is the age rating for Risi?

Risi has an age rating of 4+, making it suitable for a broad audience. The app is developed by Axel Le Pennec.

Does Risi have ads?

No, Risi does not contain advertisements. The app's monetization is solely through an optional one-time in-app purchase for full feature access.