Molarity Abacus vs Ring Sizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Molarity Abacus
Easily calculate molarity, solution volume, solute mass, or molecular weight by inputting any three variables. Customize units and access pre-configured strong acids and bases. An in-app purchase allows for creating and storing custom compounds.
- Molarity calculation
- Solute mass calculation
- Total solution volume calculation
- Molecular weight calculation
- Customizable units
- Pre-configured compounds
- Create and store custom compounds
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- Easily calculate Molarity, Total Solution Volume, Solute Mass, or Molecular Weight. - Simply input three of the four variables and the fourth is calculated automatically. - The units can be changed for Total Solution Volume, Solute Mass, or Molecular Weight. - In-App purchase available to create and store compounds for quick access. The Molarity Abacus is a simple and easy way to do molarity calculations. Simply input any three of the four variables and the fourth will be instantly calculated. Includes full help documentation on each screen. The seven strong acids and eight strong bases are pre-configured in the app and can be selected from a list of compounds. With an In-App purchase, you gain even more functionality allowing you to create and store compounds for repeated use. You name the compound, select the elements in it, set the number of atoms for each element, and the molecular weight is calculated automatically. The full periodic table is included and has been loaded with molecular weights and checked against publicly available sources on the internet. The element weights can be edited. This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http://www.openssl.org/)
Ring Sizer
Instantly determine your precise ring size for online shopping, custom orders, or gift purchases. Offers multiple international sizing standards and saves your measurements for future use. Get accurate results with clear, step-by-step instructions.
- Instant ring size measurement
- Support for multiple international sizing standards
- Save and access size history
- Step-by-step measurement guidance
- Measure for custom ring widths
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Ring Sizer: Find Your Perfect Ring Size Find your perfect ring size instantly with Ring Sizer. Whether you're shopping for an engagement ring, ordering a wedding band online, or checking your size for custom jewelry, get accurate measurements in seconds. Perfect for: - Engagement ring shopping online - Wedding band sizing at home - Jewelry gift purchases - Custom ring orders - Online shopping preparation Key Features: - Instant Measurement: Get your ring size in seconds with easy-to-use tools - Multiple Standards: Supports US, UK, EU, and international sizing systems - Size History: Save and access your measurements for future reference - Step-by-Step Guidance: Clear instructions ensure accurate results - Custom Width Support: Measure for different ring styles and widths Never guess your ring size again. Download Ring Sizer and shop with confidence. Some features may require an in-app purchase. Need help? Contact us at support@reku.dev Privacy Policy: https://myringsizer.app/privacy.html Terms & Conditions: https://myringsizer.app/terms.html
Screenshots
Verdict
The clearest difference is update cadence: Ring Sizer at every 3 weeks against Molarity Abacus's every 12 months. Ring Sizer also leads on rating (4.8 vs 4.5). Molarity Abacus's advantage is review sentiment (100% vs 71%) and iOS requirement (8.0 vs 17.0). On price, ratings volume, ads and in-app purchases 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. Molarity Abacus sells 1 one-off in-app purchase and Ring Sizer sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Ring Sizer holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 15 and 35 respectively. Written reviews complicate that: 100% of Molarity Abacus's written reviews are positive against 71% of Ring Sizer's, so the app with the better star average is not the one people write more warmly about.
Molarity Abacus ships an update every 12 months, Ring Sizer every 3 weeks. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.
| Parameter | Molarity Abacus | Ring Sizer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (15 ratings) | 4.8 (35 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 71.4% of reviews |
| Number of ratings | 15 | 35 — better |
| Update frequency | Every 12 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Oak Driven LLC | Ramkumar Vellaisamy |
Customer experience
Molarity Abacus
Ring Sizer
In-app purchases
Molarity Abacus
- Create and Save CompoundsFree
Ring Sizer
- Ring Sizer Weekly$3.997 Days
- Ring Sizer Yearly$9.991 Year
- Ring Sizer Lifetime$19.99
Questions
Is Molarity Abacus free?
Is Ring Sizer free?
Which has better reviews, Molarity Abacus or Ring Sizer?
Do Molarity Abacus or Ring Sizer have ads?
Which is updated more often, Molarity Abacus or Ring Sizer?
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