# Acid Base pH vs WebMO Premium

The clearest difference is rating: Acid Base pH at 5.0 against WebMO Premium's 4.0. Acid Base pH also leads on review sentiment (100% vs 67%) and update cadence (every 3 months vs every 17 months). WebMO Premium's advantage is ratings volume (4 vs 1) and iOS requirement (12.0 vs 17.1). On ads, in-app purchases, monetization model and device support there is nothing between them.

Acid Base pH costs $3.99 and WebMO Premium $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Acid Base pH holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews point the same way: 100% of Acid Base pH's written reviews are positive against 67% of WebMO Premium's.

Acid Base pH ships an update every 3 months, WebMO Premium every 17 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Acid Base pH | WebMO Premium |
| --- | --- | --- |
| Price | **$3.99** | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/acid-base-ph/id977951851/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/webmo-premium/id1448564335/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 17 months |
| Monetization | Paid | Paid |
| Size | 2 MB | 12 MB |
| Requires iOS | 17.1 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Volinsky](https://appshunter.io/developer/977951850) | [WebMO, LLC](https://appshunter.io/developer/797898098) |

## What reviewers say

### Acid Base pH

[App page](https://appshunter.io/ios/app/acid-base-ph/id977951851)

Accurately estimate pH values for acid-base aqueous systems. Calculate pH for weak and strong acids/bases, plot titration curves, and find equivalent points. Export data and find titrant volumes for desired pH.

**Highlights:** Estimate pH of acid-base solutions, Plot titration curves, Find pH and titrant volume at equivalent points, Export titration plots as image or data, Calculate titrant volume for desired pH, Includes list of common indicators

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### WebMO Premium

[App page](https://appshunter.io/ios/app/webmo-premium/id1448564335)

This app allows users to build and visualize molecules in 3D, access chemical information from external databases, and interact with advanced computational chemistry programs. It's designed for students and faculty needing mobile access to molecular structures and data.

**Highlights:** 3D molecular editor, VSEPR and molecular mechanics optimization, Orbital and symmetry visualization, Chemical data lookup, Computational chemistry program integration, Spectra visualization

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Acid Base pH free?

Acid Base pH costs $3.99, with no in-app purchases.

### Is WebMO Premium free?

WebMO Premium costs $4.99, with no in-app purchases.

### Which has better reviews, Acid Base pH or WebMO Premium?

Acid Base pH is rated higher. Acid Base pH averages 5.0 out of 5 from 1 ratings, while WebMO Premium averages 4.0 from 4 ratings.

### Do Acid Base pH or WebMO Premium have ads?

Neither Acid Base pH nor WebMO Premium shows ads.

### Which is updated more often, Acid Base pH or WebMO Premium?

Acid Base pH ships an update every 3 months, and WebMO Premium every 17 months. Most recently, Acid Base pH was updated on November 6, 2026 and WebMO Premium on November 2, 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.*