The Diamond Store Ring Sizer vs Herff Jones RightSize™
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The Diamond Store Ring Sizer
Easily determine ring sizes in UK, EU, or USA measurements using your phone. Simply place an existing ring on your screen and adjust a circle to match its inner diameter, perfect for keeping gifts a surprise.
- Accurate ring size measurement
- Supports UK, EU, and USA sizing
- Covers all sizes F-Z
- Easy to use interface
- Keeps gift purchases a surprise
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Our free Ring Size App is accurate and easy to use Find out a ring size in UK, EU or USA measurements. All sizes F - Z included, from smallest to largest finger. Simply place your loved one's existing ring on your phone screen, and then adjust the circle until it fits the inside of the ring exactly. This app helps you keep an engagement ring or a special gift a surprise and saves you a trip to the jewellers. The Diamond Store – Luxury With Confidence
Herff Jones RightSize™
Easily determine your correct ring size for ordering class rings. This app works on any mobile device and for any finger, ensuring you can confidently select your style without worrying about size accuracy.
- Find correct ring size
- Works on any mobile device
- Works for any finger
- Quick and easy to use
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When it comes to ordering your class ring, your biggest concern should be what style to pick, not your ring size. The Herff Jones RightSize™ app lets you quickly and easily find your correct ring size. • Works on any mobile device • Works for any finger you want • Quick and easy to use
Screenshots
Verdict
The clearest difference is monetization model: The Diamond Store Ring Sizer at free against Herff Jones RightSize™'s ad-supported. The Diamond Store Ring Sizer also leads on iOS requirement (13.0 vs 16.0). On price, review sentiment, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.
The Diamond Store Ring Sizer ships an update every 8 months, Herff Jones RightSize™ every 4 months. The most recent releases landed on November 1, 2026 and November 11, 2026 respectively.
| Parameter | The Diamond Store Ring Sizer | Herff Jones RightSize™ |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.8 (108 ratings) — better |
| Positive reviews | 23.5% of reviews | 25.0% of reviews — better |
| Number of ratings | — | 108 — better |
| Update frequency | Every 8 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 5 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | TheDiamondStore.co.uk | Radius Technologies |
Customer experience
The Diamond Store Ring Sizer
Herff Jones RightSize™
Bugs and requests
The Diamond Store Ring Sizer
Not enough reviews yet to summarise bugs or requests.
Herff Jones RightSize™
Reported bugs
13 issues- App is broken and does not work.
- Does not recognize device PPI.
- Will not load, showing 'something went wrong'.
- App doesn't work at all for iPhone 16.
- App doesn't recognize device ppi.
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- App doesn't work for iPhone 16.
- App doesn't work at all.
- When you download it and try to begin, it makes you watch video after video of adds to gain That is literally all so sorry, you cannot enter the app
- Does nothing, each time I tried it , it says my finger size is 0.
- The ring ended up so loose that I had to wear it on my thumb instead of my FY finger. It’s still loose on my thumb.
- Didn’t get the right finger size, sometimes sends me to the main menu for no reason
- Makes you download it size your finger then brings you back to the main screen no information given.
- Every time I place a finger in the location, the phone thinks I’m trying to close the app. Couldn’t place my finger to properly size
In-app purchases
The Diamond Store Ring Sizer
No in-app purchases
Herff Jones RightSize™
No in-app purchases
Questions
Is The Diamond Store Ring Sizer free?
Is Herff Jones RightSize™ free?
Do The Diamond Store Ring Sizer or Herff Jones RightSize™ have ads?
Which is updated more often, The Diamond Store Ring Sizer or Herff Jones RightSize™?
Other comparisons
