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
Easily create and track countdowns for all your important events with customizable reminders and widgets. Organize events with tags and personalize them with unique designs to stay on top of your schedule.
- Event countdowns (days, hours, minutes)
- Repeat event tracking
- Home screen widgets
- Customizable event cards
- Customizable reminders
- Tag filtering for organization
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Countdown Widget: Countful is the ultimate event reminder and tracker designed to help you stay organized and never miss a moment. Easily create countdowns for all your important events—from birthdays to holidays—and customize them to match your style. Add repeat events to automatically track daily, weekly, monthly, or yearly events. Set custom reminders to notify you before the event based on your preferred time, ensuring you’re always prepared. With tags, you can categorize and filter events by tag or name, making it simple to find and manage your events. Key features: • Event countdown: Track days, hours, and minutes until your upcoming events. • Repeat events: Automatically track repeating events on a daily, weekly, or yearly basis. • Widgets: Add countdowns to your home screen for quick access to upcoming events. • Customizable event cards: Personalize each event with stunning gradients or custom images. • Custom reminders: Set notifications before an event with flexible reminder settings. • Tag filtering: Organize events by tags or names for easy filtering and management. Stay on top of your schedule with Countdown Widget: Countful—your all-in-one tool for tracking and managing important events! For more information, visit https://indiegoodies.com/countdown 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 5 days vs every 12 months). Molarity Abacus's advantage is iOS requirement (8.0 vs 17.0). On price, review sentiment, ratings volume 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. 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 split almost evenly too, at 100% and 100% positive.
Molarity Abacus ships an update every 12 months, Countdown Widget every 5 days. The most recent releases landed on September 20, 2026 and June 3, 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 | 100.0% of reviews |
| Number of ratings | 15 — better | 13 |
| Update frequency | Every 12 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 47 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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