# Molarity Abacus vs Multi Search Engine

The clearest difference is price: Molarity Abacus at Free against Multi Search Engine's $0.99. Molarity Abacus also leads on ratings volume (15 vs 1) and iOS requirement (8.0 vs 15.0). Multi Search Engine's advantage is rating (5.0 vs 4.5) and in-app purchases (none vs 1). On update cadence and ads there is nothing between them.

Molarity Abacus is free to download; Multi Search Engine costs $0.99 up front. Molarity Abacus sells 1 one-off in-app purchase. Multi Search Engine asks for nothing beyond the download.

Multi Search Engine holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Molarity Abacus has 15 ratings behind it against 1, so its average is the more settled of the two.

Molarity Abacus ships an update every 12 months, Multi Search Engine every 7 months. The most recent releases landed on September 20, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Molarity Abacus | Multi Search Engine |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.5 (15 ratings)](https://appshunter.io/ios/app/molarity-abacus/id915807653/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/multi-search-engine/id1672855306/reviews)** |
| Number of ratings | **15** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 7 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 2 MB | 2 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Oak Driven LLC](https://appshunter.io/developer/915807656) | [伟胜 林](https://appshunter.io/developer/1107947419) |

## What reviewers say

### Molarity Abacus

[App page](https://appshunter.io/ios/app/molarity-abacus/id915807653)

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.

**Highlights:** Molarity calculation, Solute mass calculation, Total solution volume calculation, Molecular weight calculation, Customizable units, Pre-configured compounds, Create and store custom compounds

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Create and Save Compounds | Free | one-time |


### Multi Search Engine

[App page](https://appshunter.io/ios/app/multi-search-engine/id1672855306)

Enhance your browsing with a powerful search tool that integrates with Safari. Switch between multiple search engines instantly from your address bar to find information faster. This utility is available for iOS, iPadOS, and macOS.

**Highlights:** Switch between search engines, Integrates with Safari, Fast search functionality, Supports iOS, iPadOS, and macOS, Single purchase for full features

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Molarity Abacus free?

Molarity Abacus is free to download, with in-app purchases available.

### Is Multi Search Engine free?

Multi Search Engine costs $0.99, with no in-app purchases.

### Which has better reviews, Molarity Abacus or Multi Search Engine?

Multi Search Engine is rated higher. Molarity Abacus averages 4.5 out of 5 from 15 ratings, while Multi Search Engine averages 5.0 from 1 ratings.

### Do Molarity Abacus or Multi Search Engine have ads?

Neither Molarity Abacus nor Multi Search Engine shows ads.

### Which is updated more often, Molarity Abacus or Multi Search Engine?

Molarity Abacus ships an update every 12 months, and Multi Search Engine every 7 months. Most recently, Molarity Abacus was updated on September 20, 2026 and Multi Search Engine on September 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*