Dornheim 3D Scanner vs Ring Sizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dornheim 3D Scanner
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Dornheim 3D Scanner uses the FaceID camera to take true-to-scale 3D photos in order to carry out a wide variety of measurements. Measurements of lengths, distances, angles, surfaces, diameters, circumferences and volumes are possible. The dimensions can be determined both directly in 3D space and along the surface. Volumes can also be determined from elevations and depressions. The 3D photos and measurements can be imported and exported using various formats, including the SEG format of the Dornheim Segmenter. APPLICATION With Dornheim 3D Scanner you can quickly and easily - Capture 3D photos to scale - Measure 3D photos to scale without tools - Import and export 3D photos and measurements - Create 3D photos and measurements for Dornheim Segmenter and Dornheim Real Anatomy HIGHLIGHTS - Measure lengths, distances, angles, surfaces, diameters, circumferences, volumes - Determine the volume of elevations and depressions - Perform measurements both in 3D space and on surfaces - Export to SEG, STL, OBJ, PLY - Available languages: English, French, German, Spanish Terms of use: standard Apple Terms of Use (EULA) (https://www.apple.com/legal/internet-services/itunes/dev/stdeula/)
Ring Sizer
Accurately measure ring and finger sizes from home, ensuring a perfect fit for any occasion. Convert sizes internationally and save measurements for future use. Ideal for online ring purchases, eliminating guesswork.
- Measure ring diameter/circumference
- Measure finger width
- International size conversions
- Save measurements
- Share measurements
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Quickly and easily find the perfect ring size with this ring and finger sizing app—offering the same precision as your jeweler, from the comfort of your home. Whether you're a professional jeweler, a frequent shopper, or purchasing your first ring, Risi ensures the perfect fit for every special occasion—engagements, weddings, birthdays, holidays, or surprises! Measure fingers or rings with ease, whether it's for yourself, a friend, a family member, or anyone special, and convert sizes across international standards. Risi is the go-to tool for anyone buying a ring online, eliminating the fear of choosing the wrong size. • Get the exact size of any ring: Measure the diameter or circumference in either metric (millimeters) or imperial (US inches) units, for yourself or someone else. • Accurately measure finger size: Easily measure finger width, perfect for when you don't have a ring on hand. • International size conversions: Seamlessly switch between popular global sizing systems (US/CA/MX, UK/AU/NZ, EU/ISO, JP/CN, and more) while maintaining accuracy. • Save measurements: Keep ring and finger sizes saved for future reference and easy access. • Share measurements: Share size info with jewelers or friends via text, email, or social media. No more guessing! With Risi, shop confidently and experience the joy of buying or giving a perfectly sized ring that will be cherished forever. Make special moments unforgettable with a ring that fits just right. To unlock all features and functionality, you can make a one-time in-app purchase for lifetime access (no subscription). This purchase will be charged to your Apple account at the time of confirmation. Privacy Policy: https://ringfitter.alpennec.com/privacy Terms and Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is update cadence: Ring Sizer at weekly against Dornheim 3D Scanner's every 17 months. Dornheim 3D Scanner's advantage is iOS requirement (13.0 vs 17.0). 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. Dornheim 3D Scanner sells 7 in-app purchases, starting at $9.99 per month and Ring Sizer sells 13 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Dornheim 3D Scanner ships an update every 17 months, Ring Sizer weekly. The most recent releases landed on September 17, 2026 and September 9, 2026 respectively.
| Parameter | Dornheim 3D Scanner | Ring Sizer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (36 ratings) — better |
| Positive reviews | — | 88.2% of reviews |
| Number of ratings | — | 36 — better |
| Update frequency | Every 17 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 11 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Dornheim Medical Images GmbH | Axel Le Pennec |
In-app purchases
Dornheim 3D Scanner
- Premium$9.991 Month
- Export function - Monthly$4.99
- Measurement - Monthly$9.99
- Export function - Yearly$39.99
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- Measurement - Yearly$79.99
- Export function - Perpetual$99.99
- Measurement - Perpetual$199.99
Ring Sizer
- Weekly3 Days trial2 variants$4.997 Days
- Weekly$4.997 Days
- Weekly3 Days trial$5.997 Days
Show 5 moreShow fewer
- Weekly$6.997 Days
- Weekly3 Days trial$6.997 Days
- Weekly3 Days trial$7.997 Days
- Yearly$17.991 Year
- Yearly3 Days trial$24.991 Year
- Lifetime$2.99
- Lifetime$4.99
- Lifetime$6.99
Show 2 moreShow fewer
- Lifetime2 variants$19.99
- Lifetime$99.99
Questions
Is Dornheim 3D Scanner free?
Is Ring Sizer free?
Do Dornheim 3D Scanner or Ring Sizer have ads?
Which is updated more often, Dornheim 3D Scanner or Ring Sizer?
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