Janus Calculator vs Molarity Calcs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Janus Calculator
This app offers a unique dual-calculator interface, supporting both standard and Reverse Polish Notation. It features programmable functions, extensive scientific and financial tools, and includes physical constants and an advanced option calculator.
- Dual calculator interface (Standard and RPN)
- Programmable functions
- Finance and scientific functions
- Physical constants
- Black-Scholes option calculator
- Implied value calculation
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Two-sided calculator. Side A uses Standard Notation, Side B uses Reverse Polish Notation. Both calculators are programmable, include various finance and scientific functions, and the values of 45 physical constants. Also includes a Black-Scholes option calculator, including calculation of implied values for each of the inputs.
Molarity Calcs
This app helps users quickly calculate molarity for various chemistry needs. It supports calculations for mass to volume, volume to mass, and dilutions, making it a handy tool for students and professionals.
- Mass to volume calculations
- Volume to mass calculations
- Dilution calculations
- Fast and efficient
- User-friendly interface
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Calculate mass to add to a volume, volume to add to a mass, or make a dilution. Fast.
Screenshots
Verdict
The clearest difference is rating: Molarity Calcs at 5.0 against Janus Calculator's 2.0. Molarity Calcs also leads on update cadence (every 4 days vs every 45 months) and review sentiment (100% vs 83%). 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. Neither carries in-app purchases, so what you see is what you pay.
Molarity Calcs holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 83% of Janus Calculator's written reviews are positive against 100% of Molarity Calcs's.
Janus Calculator ships an update every 45 months, Molarity Calcs every 4 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.
| Parameter | Janus Calculator | Molarity Calcs |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 83.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 45 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 26.2 | 15.5 — better |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Geoffrey Domm | Jeff Schoellerman |
Customer experience
Janus Calculator
Molarity Calcs
In-app purchases
Janus Calculator
No in-app purchases
Molarity Calcs
No in-app purchases
Questions
Is Janus Calculator free?
Is Molarity Calcs free?
Which has better reviews, Janus Calculator or Molarity Calcs?
Do Janus Calculator or Molarity Calcs have ads?
Which is updated more often, Janus Calculator or Molarity Calcs?
Other comparisons
