Ring Sizer vs LoopSize
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ring Sizer
Accurately determine your ring size using your phone's screen or a built-in ruler. Supports multiple international sizing standards and allows saving measurements for future use. Ideal for online shoppers and jewelers.
- Measure ring size via diameter or circumference
- Supports US, UK, EU/ISO, AU, JP, CN, RU sizes
- Built-in screen ruler for finger measurement
- Save measurements for multiple users
- Ad-free experience
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Sizerly is a simple and precise tool for finding the right ring size using your phone. Whether you already have a ring to measure or need to find your finger size directly, Sizerly offers an intuitive way to get reliable sizing results in seconds. Just place a ring on your screen and adjust the sizing circle, or use the built-in ruler to measure your finger diameter. Sizerly supports all major international sizing standards, so you can shop confidently online or in-store. Key Features: - Measure ring size using diameter or circumference - Includes major size systems: US, UK, EU/ISO, AU, JP, CN, RU - Built-in screen ruler for measuring fingers - Save measurements for future use or multiple users Sizerly is ideal for online shoppers, gift buyers, and jewelers. It’s accurate, easy to use, and designed without ads for a smooth experience. Privacy Policy: https://di-apps-dev.web.app/privacy.html Terms of Use: https://di-apps-dev.web.app/terms.html
LoopSize
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Find the right ring size before you buy online, choose a gift, travel, or help a jewelry customer. LoopSize is a precise ring size converter and measurement tool for shoppers, gift buyers, jewelers, and anyone who needs to compare ring sizes across countries. Measure a ring or finger by diameter or circumference, then instantly see matching sizes in the most common international standards. Use LoopSize when you want to: • Check a ring size before ordering from an online store. • Convert ring sizes between countries while shopping abroad. • Choose a gift ring with more confidence. • Help jewelry customers compare local and international sizes. • Record finger and ring measurements for future purchases. • Share a clean PDF with a store, customer, partner, or family member. • Keep diameter and circumference visible for more precise decisions. How it works: 1. Measure the ring or finger using diameter or circumference. 2. LoopSize converts the measurement into equivalent ring sizes. 3. Save the result, review it later, or share it as a PDF. Supported standards: BR, US, UK, EU/ISO, JP, CN, and IN. LoopSize focuses on the measurement behind the size. Instead of guessing from a chart, you can work from the actual diameter or circumference and compare results across multiple standards in one place. This is useful for engagement rings, wedding bands, fashion rings, adjustments, resizing conversations, and repeat purchases. For shoppers, LoopSize helps reduce confusion when product pages use different ring sizing systems. For gifts, it gives you a simple way to save and compare possible sizes. For jewelers, it creates a faster workflow for checking measurements, explaining conversions, and sending results to customers. Pro features: • Branded PDFs help jewelers send professional measurement summaries to customers. • iCloud sync keeps measurements and preferences available across devices. • Measurement history helps with repeat customers, future purchases, and follow-up fittings. Privacy Policy: https://adrianosouzacosta.com.br/apps/loopsize/privacy-policy Terms of Use: https://adrianosouzacosta.com.br/apps/loopsize/terms-of-use
Screenshots
Verdict
The clearest difference is update cadence: Ring Sizer at every 2 weeks against LoopSize's every 3 months. Ring Sizer also leads on iOS requirement (16.0 vs 18.0). 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. Ring Sizer sells 2 in-app purchases, starting at $3.99 per 7 days and LoopSize sells 4 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Ring Sizer ships an update every 2 weeks, LoopSize every 3 months. The most recent releases landed on June 4, 2026 and September 13, 2026 respectively.
| Parameter | Ring Sizer | LoopSize |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 10 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Dziyana Dashynevich | Adriano Souza Costa |
In-app purchases
Ring Sizer
- Weekly Premium$3.997 Days
- Annual Premium$19.991 Year
LoopSize
- Weekly3 Days trial$0.997 Days
- Monthly$0.991 Month
- Annual7 Days trial$24.991 Year
- Lifetime$24.99








