# DrPhos' Reaction Balancer vs UStrive App

The clearest difference is price: UStrive App at Free against DrPhos' Reaction Balancer's $0.99. UStrive App also leads on in-app purchases (none vs 11) and ratings volume (11 vs 3). DrPhos' Reaction Balancer's advantage is rating (3.7 vs 2.9). On update cadence, ads and device support there is nothing between them.

UStrive App is free to download; DrPhos' Reaction Balancer costs $0.99 up front. DrPhos' Reaction Balancer sells 11 one-off in-app purchases. UStrive App asks for nothing beyond the download.

DrPhos' Reaction Balancer holds the better App Store score, 3.7 against 2.9. Both are backed by a comparable volume of ratings — 3 and 11 respectively.

DrPhos' Reaction Balancer ships an update every 3 weeks, UStrive App every 5 weeks. The most recent releases landed on September 30, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | DrPhos' Reaction Balancer | UStrive App |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/drphos-reaction-balancer/id6474077005/reviews)** | [2.9 (11 ratings)](https://appshunter.io/ios/app/ustrive-app/id6749835492/reviews) |
| Number of ratings | 3 | **11** |
| Positive reviews | — | 57.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 15 MB | 46 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Monte L Helm](https://appshunter.io/developer/1715082616) | [UStrive](https://appshunter.io/developer/1832382635) |

## What reviewers say

### DrPhos' Reaction Balancer

[App page](https://appshunter.io/ios/app/drphos-reaction-balancer/id6474077005)

Instantly balance chemical equations with this tool. It supports complex formulas and provides clear visual formatting, making it ideal for students learning stoichiometry and preparing for chemistry exams.

**Highlights:** Automatically balances chemical equations, Supports complex formulas with parentheses, Clear visual formatting with subscripts, Built-in learning support, Molar Mass Calculator, Stoichiometry Solver

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quadratic Equation Solver | $0.99 | one-time |
| Significant Figures Counter | $0.99 | one-time |
| Science Calculator | $0.99 | one-time |
| Molar Mass Calculator | $0.99 | one-time |
| General Chemistry Naming | $0.99 | one-time |
| Ionic Compound Builder | $0.99 | one-time |
| pH Calculator | $0.99 | one-time |
| Reaction Balancer | $0.99 | one-time |
| Stoichiometry | $0.99 | one-time |
| Solution Concentration | $0.99 | one-time |
| Kinetics | $0.99 | one-time |


### UStrive App

[App page](https://appshunter.io/ios/app/ustrive-app/id6749835492)

This platform connects students and young professionals with experienced mentors for personalized guidance on college and career goals. It offers one-on-one support through in-app messaging, audio, and video calls to help users succeed.

**Highlights:** Connect with experienced mentors, Personalized college and career guidance, In-app messaging, audio, and video calls, Match mentors based on goals, 1-on-1 support for success

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

**In-app purchases:** none


## Frequently asked questions

### Is DrPhos' Reaction Balancer free?

DrPhos' Reaction Balancer costs $0.99, and also offers in-app purchases.

### Is UStrive App free?

UStrive App is free to download, with no in-app purchases.

### Which has better reviews, DrPhos' Reaction Balancer or UStrive App?

DrPhos' Reaction Balancer is rated higher. DrPhos' Reaction Balancer averages 3.7 out of 5 from 3 ratings, while UStrive App averages 2.9 from 11 ratings.

### Do DrPhos' Reaction Balancer or UStrive App have ads?

Neither DrPhos' Reaction Balancer nor UStrive App shows ads.

### Which is updated more often, DrPhos' Reaction Balancer or UStrive App?

DrPhos' Reaction Balancer ships an update every 3 weeks, and UStrive App every 5 weeks. Most recently, DrPhos' Reaction Balancer was updated on September 30, 2026 and UStrive App on September 28, 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.*