Molarity Abacus vs Countdown Widget
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/)
Countdown Widget
This app helps you track important dates like birthdays and anniversaries by displaying countdowns directly on your Home Screen. It offers customizable reminders, the ability to count up from milestones, and iCloud synchronization across devices.
- Home Screen countdown widgets
- Customizable reminders
- Repeating event tracking
- Count up from milestones
- Personalized event themes
- Calendar import
- iCloud sync
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Never miss the dates that matter. Birthdays, anniversaries, trips and deadlines have a way of sneaking up on you. Countful keeps every important date right on your Home Screen, counting down the days so you always have time to prepare. WHY PEOPLE LOVE COUNTFUL • Countdown widgets: See days, hours and minutes left on your Home Screen, Lock Screen and StandBy. No need to open the app. • Reminders that arrive in time: Get notified days, hours or minutes before the big day. Snooze any reminder for an hour with one tap. • Repeating events: Birthdays and anniversaries repeat every year automatically, and your reminders keep coming every time. • Count up too: Track days since a milestone, a habit or a special moment. • Make it yours: Add your own photo, pick a gradient, a pattern and an emoji for every event. • Import from Calendar: Bring in the dates you already have instead of typing them by hand. • Tags and search: Group events by tag and find anything in seconds. • Archive: Hide past or paused events without losing them. Archived events stay quiet until you bring them back. • iCloud sync: Your countdowns stay up to date on all your devices. PERFECT FOR Birthdays, anniversaries, weddings, vacations, trips, holidays, Christmas, New Year, exams, deadlines, due dates, concerts and every day you're looking forward to. COUNTFUL PRO Unlock unlimited events, Calendar import and every widget style with a monthly, yearly or one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use: https://indiegoodies.com/countdown/terms Privacy Policy: https://indiegoodies.com/countdown/privacy
Screenshots
Verdict
The clearest difference is rating: Countdown Widget at 4.9 against Molarity Abacus's 4.5. Countdown Widget also leads on update cadence (every 11 days vs every 12 months). Molarity Abacus's advantage is review sentiment (100% vs 86%) 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 Countdown Widget sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Countdown Widget holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 15 and 13 respectively. Written reviews complicate that: 100% of Molarity Abacus's written reviews are positive against 86% of Countdown Widget'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, Countdown Widget every 11 days. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.
| Parameter | Molarity Abacus | Countdown Widget |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (15 ratings) | 4.9 (13 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 85.7% of reviews |
| Number of ratings | 15 — better | 13 |
| Update frequency | Every 12 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Oak Driven LLC | Khuong Pham |
Customer experience
Molarity Abacus
Countdown Widget
In-app purchases
Molarity Abacus
- Create and Save CompoundsFree
Countdown Widget
- Monthly$0.991 Month
- Yearly$5.991 Year
- Discount lifetime access$3.99
- Lifetime access$9.99
Questions
Is Molarity Abacus free?
Is Countdown Widget free?
Which has better reviews, Molarity Abacus or Countdown Widget?
Do Molarity Abacus or Countdown Widget have ads?
Which is updated more often, Molarity Abacus or Countdown Widget?
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