# Pre vs BioLabCalculators

The clearest difference is price: Pre at Free against BioLabCalculators's $6.99. BioLabCalculators's advantage is in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

Pre is free to download; BioLabCalculators costs $6.99 up front. Pre sells 1 in-app purchase, starting at $9.99 per month. BioLabCalculators asks for nothing beyond the download.

Pre ships an update every 6 months, BioLabCalculators every 10 months. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Pre | BioLabCalculators |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | **[4.7 (357 ratings)](https://appshunter.io/ios/app/pre-algebra/id459734695/reviews)** | — |
| Number of ratings | **357** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 10 months |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 1 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YourTeacher.com](https://appshunter.io/developer/340925628) | [Valeriy Tarasov](https://appshunter.io/developer/1470827581) |

## What reviewers say

### Pre

[App page](https://appshunter.io/ios/app/pre-algebra/id459734695)

Access a comprehensive Pre-Algebra curriculum with video lessons, guided practice, and assessments. Track your learning progress and reinforce knowledge with chapter reviews and a final exam. A free trial is available.

**Highlights:** Video instruction, Guided practice, Tests and quizzes, Worksheets and notes, Progress tracking, Chapter reviews, Final exam

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get full access to Pre-Algebra | $9.99 | per month |

**What reviewers like**

- 👍 Easy to learn from
- 👍 Short videos make learning easy
- 👍 Simple and good layout
- 👍 Outstanding app
- 👍 Helps significantly with pre-algebra

**What reviewers complain about**

- 🐛 App freezes and needs reinstallation
- 🐛 Opening app requires charger plugged in
- 🐛 Multiple choice answers don't show up
- 🐛 Doesn't explain commutative and associative properties well
- 🐛 Describing alternative PEMDAS methods as wrong is not ideal

**Reported bugs**

- App freezes
- Opening app without charger plugged in displays blank page
- Multiple choice answers don't show up on screen
- Daughter's progress and grades disappeared
- App is blank and not working

**Requested features**

- Algebra 2 content
- Better explanation of commutative and associative properties
- Side-by-side comparison of properties
- Allow writing on the screen
- More fraction problems


### BioLabCalculators

[App page](https://appshunter.io/ios/app/biolabcalculators/id1480948459)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pre free?

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

### Is BioLabCalculators free?

BioLabCalculators costs $6.99, with no in-app purchases.

### Do Pre or BioLabCalculators have ads?

Neither Pre nor BioLabCalculators shows ads.

### Which is updated more often, Pre or BioLabCalculators?

Pre ships an update every 6 months, and BioLabCalculators every 10 months. Most recently, Pre was updated on September 8, 2026 and BioLabCalculators on September 10, 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.*