# DrPhos' Solution Calculator vs LSAT Practice Test & Exam Prep

The clearest difference is price: LSAT Practice Test & Exam Prep at Free against DrPhos' Solution Calculator's $0.99. LSAT Practice Test & Exam Prep also leads on iOS requirement (13.0 vs 17.2). On update cadence, ads, in-app purchases and device support there is nothing between them.

LSAT Practice Test & Exam Prep is free to download; DrPhos' Solution Calculator costs $0.99 up front. DrPhos' Solution Calculator sells 10 one-off in-app purchases and LSAT Practice Test & Exam Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | DrPhos' Solution Calculator | LSAT Practice Test & Exam Prep |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 15 MB | 47 MB |
| Requires iOS | 17.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Monte L Helm](https://appshunter.io/developer/1715082616) | [3328833 Nova Scotia Limited](https://appshunter.io/developer/1757830011) |

## What reviewers say

### DrPhos' Solution Calculator

[App page](https://appshunter.io/ios/app/drphos-solution-calculator/id6478795025)

**Features:** macOS Compatibility

**In-app purchases (10)**

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


### LSAT Practice Test & Exam Prep

[App page](https://appshunter.io/ios/app/lsat-practice-test-and-exam-prep/id6744628087)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $9.99 | one-time |


## Frequently asked questions

### Is DrPhos' Solution Calculator free?

DrPhos' Solution Calculator costs $0.99, and also offers in-app purchases.

### Is LSAT Practice Test & Exam Prep free?

LSAT Practice Test & Exam Prep is free to download, with in-app purchases available.

### Do DrPhos' Solution Calculator or LSAT Practice Test & Exam Prep have ads?

Neither DrPhos' Solution Calculator nor LSAT Practice Test & Exam Prep shows ads.

### Which is updated more often, DrPhos' Solution Calculator or LSAT Practice Test & Exam Prep?

DrPhos' Solution Calculator ships an update every 2 months, and LSAT Practice Test & Exam Prep every 2 months. Most recently, DrPhos' Solution Calculator was updated on October 7, 2026 and LSAT Practice Test & Exam Prep on October 4, 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.*