Pre vs BioLabCalculators
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pre
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.
- Video instruction
- Guided practice
- Tests and quizzes
- Worksheets and notes
- Progress tracking
- Chapter reviews
- Final exam
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YourTeacher provides a complete Pre-Algebra curriculum with a personal math teacher. Search for the exact lesson you need or simply take the course from start to finish. Every lesson features video instruction, guided practice, tests, background modules, diagnostic quizzes, worksheets, notes, and more. Track your progress with our dynamic grade report and use the chapter reviews and final exam to solidify your knowledge. 3-Day Free Trial! Cancel at any time during the first 3 days after you’ve purchased the program and you will not be charged for the purchase! Terms of use: https://storage.googleapis.com/mathhelp/content/license/license-terms-and-conditions.pdf Privacy Policy https://storage.googleapis.com/mathhelp/content/license/privacy.pdf
BioLabCalculators
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It also includes a colonies counter. The photo of a Petri dish can be directly taken by iPhone camera or imported from the iPhone photo library. The provided calculators and converters are: Dilution calculator, Molarity calculator, Ligation calculator, SDS PAG calculator, Ammonium sulfate calculator, Bacteria growth calculator, Nucleic acid OD calculator, Nucleic acid amount converter, Protein amount converter The app contains also the lists of genetic code, protein code and nucleotide ambiguity code.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Pre | BioLabCalculators |
|---|---|---|
| Price | Free — better | $6.99 |
| Rating | 4.7 (357 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 357 — better | — |
| Update frequency | Every 6 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 15 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | YourTeacher.com | Valeriy Tarasov |
Bugs and requests
Pre
Reported bugs
5 issues- 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
5 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Pre
- Get full access to Pre-Algebra3 Days trial$9.991 Month
BioLabCalculators
No in-app purchases
Questions
Is Pre free?
Is BioLabCalculators free?
Do Pre or BioLabCalculators have ads?
Which is updated more often, Pre or BioLabCalculators?
Other comparisons
