Femtek Sizer vs Ring Sizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Femtek Sizer
This utility app helps you find your ring size accurately using your phone's screen. Simply place a ring on your device and adjust the slider to match the size, eliminating the need for physical tools or guesswork.
- On-screen ring sizing
- Slider adjustment for precise measurement
- Eliminates need for physical tools
- Troubleshooting guide available
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Say goodbye to printing charts, measuring with a string, or unsustainable plastic sizing kits. Simply place a ring that you wear on your index finger on the screen, and adjust the slider until you find the right size for you! Further instructions and troubleshooting can be found at http://www.femtek.co/faq/ subtitle (caption that is visible under app name on App Store): Femtek BBRing sizing app! Say Goodbye to guessing your size!
Ring Sizer
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The simplest way to find your ring size - no paper, no string, no jeweler required. Place your ring on the screen, adjust the circle, and get your exact size in seconds. One tool, every size standard, zero subscriptions. WORKS TWO WAYS - Place an existing ring on screen to match the size instantly - Measure your finger directly using the on-screen guide EVERY SIZE STANDARD INCLUDED - US / Canada - UK / Australia - Europe / ISO - Japan / China - Millimeters & inches BUILT FOR THE MOMENT - Engagement ring shopping - Wedding band ordering - Jewelry gifts - measure while they sleep - Online ring purchases with no size guide WHY RING SIZER - No subscription - $4.99 once, yours forever - Save your measurements for every finger - Lightweight - under 5MB - Clean, accurate, no bloat HOW IT WORKS 1. Place your ring on the circle on screen 2. Drag the slider until the circle matches your ring 3. Read your size in any international standard 4. Save it - never measure again Whether you're buying an engagement ring or ordering jewelry online, get the size right the first time. No subscriptions. No nonsense. $4.99. https://www.apple.com/legal/internet-services/itunes/dev/stdfla/
Screenshots
Verdict
The clearest difference is in-app purchases: Femtek Sizer at none against Ring Sizer's 3. Femtek Sizer also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.0). Ring Sizer's advantage is update cadence (every 2 months vs every 5 months). On price 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 3 one-off in-app purchases. Femtek Sizer asks for nothing beyond the download.
Femtek Sizer ships an update every 5 months, Ring Sizer every 2 months. The most recent releases landed on October 2, 2026 and October 16, 2026 respectively.
| Parameter | Femtek Sizer | Ring Sizer |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Femtek | Cloud Motion Lab LLC |
In-app purchases
Femtek Sizer
No in-app purchases
Ring Sizer
- RingSizerPremium$4.99
- Lifetime Pro - Special Offer$9.99
- Lifetime$14.99
