Comparison

HPLC Calculator vs Gemini Notebook

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HPLC Calculator

Features
Read full description

This app is a powerful tool designed for R&D and QC departments, helping streamline essential lab and HPLC calculations. Ask questions and troubleshoot chromatography challenges Share knowledge and best practices Discuss methods, instrumentation, and real-world lab scenarios Connect with scientists, students, and professionals globally It supports: System Suitability Calculations for HPLC Buffer Preparation and pH Adjustments Linearity and Regression Analysis General Reagent and Solution Calculations In addition, the Chromatography Forum built into the app offers a collaborative space to: Ask questions and troubleshoot chromatography challenges Share knowledge and best practices Discuss methods, instrumentation, and real-world lab scenarios Connect with scientists, students, and professionals globally Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Gemini Notebook

Transform complex information into clear insights with this AI-powered notebook. Upload documents, videos, or websites to generate summaries, ask questions, and listen to audio overviews on the go. Ideal for students, professionals, and creators seeking efficient learning and productivity.

Highlights
  • Upload PDFs, websites, and videos
  • AI-powered summarization and insights
  • Ask questions about uploaded sources
  • Podcast-style audio overviews
  • Background playback and offline support
  • In-line source citation
Read full description

Turn complexity into clarity with Gemini Notebook, your brain’s new best friend. Join the millions of students, creators, researchers, professionals, CEOs, and more who are saving time, getting stuff done, and learning in new ways. “One of the most compelling and completely flabbergasting demonstrations of AI’s potential yet.” – The Wall Street Journal Now, with the Gemini Notebook app, you can create and access notebooks, ask questions whenever you think of them, and listen to your podcast-style Audio Overviews on the go with background playback and offline support. UPLOAD SOURCES Upload all your long and complex PDFs, websites, YouTube videos, or text into a notebook. INSIGHTS YOU CAN TRUST Gemini Notebook becomes an expert on your sources, summarizing them and making interesting connections. Then, you can ask it questions about, well, anything — and you can trust the answers, since your sources are cited in-line. LEARN YOUR OWN WAY Long blocks of text not your preferred way to learn? Transform what you uploaded into something more your speed, like a podcast-style audio discussion with two engaging AI hosts. You can even join the show to ask questions or steer the conversation in a different direction.

Screenshots

HPLC Calculator4 screens
Gemini Notebook4 screens

Verdict

The call

The clearest difference is ads: Gemini Notebook at none against HPLC Calculator's shown. Gemini Notebook also leads on update cadence (weekly vs every 5 weeks) and chart position (#48 vs unranked). HPLC Calculator's advantage is iOS requirement (13.0 vs 17.0). On price, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. HPLC Calculator sells 6 in-app purchases, starting at $0.59 per month and Gemini Notebook sells 7 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

HPLC Calculator ships an update every 5 weeks, Gemini Notebook weekly. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

Scorecard4 real differences · 7 level
HPLC Calculator versus Gemini Notebook: the parameters behind the verdict, then further details
ParameterHPLC CalculatorGemini Notebook
PriceFreeFree
Rating—4.9 (65K ratings) — better
Positive reviews—77.7% of reviews
Number of ratings—65K — better
Update frequencyEvery 5 weeksWeekly — better
AdsYesNo — better
In-app purchasesYesYes
Monetization—Free with in-app purchases
Best chart rank—#48 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size66 MB212 MB
Age rating4+12+
DeveloperYouhana MehanyGoogle

Bugs and requests

HPLC Calculator

Not enough reviews yet to summarise bugs or requests.

Gemini Notebook

Reported bugs

2 issues
  • Audio coming through earpiece instead of speaker
  • Interactive features not working properly

Requested features

3 requests
  • Ability to curate audio summaries
  • Sync saved notes from web version
  • Add mind maps, study guides, and other advanced features

In-app purchases

6 purchases

HPLC Calculator

Subscriptions2
  • Remove Ads$0.591 Month
  • Remove Ads$4.991 Year
One-time4
  • 50K Token Top-Up$2.99
  • 100K Token Top-Up$4.99
  • 250K Token Top-Up$9.99
Show 1 more
  • 500K Token Top-Up$12.99
7 purchases

Gemini Notebook

Subscriptions7
  • 100 GB$1.991 Month
  • Google AI Plus (400 GB)2 variants$4.991 Month
  • Google AI Plus (400 GB)1 Month trial$4.991 Month
Show 4 more
  • Google AI Plus (2 TB)$9.991 Month
  • Google AI Pro (5 TB)2 variants$19.991 Month
  • Google AI Pro (5 TB)1 Month trial2 variants$19.991 Month
  • Google AI Plus (400 GB)$49.991 Year

Questions

Is HPLC Calculator free?
HPLC Calculator is free to download, with in-app purchases available.
Is Gemini Notebook free?
Gemini Notebook is free to download, with in-app purchases available.
Do HPLC Calculator or Gemini Notebook have ads?
HPLC Calculator shows ads; Gemini Notebook does not.
Which is updated more often, HPLC Calculator or Gemini Notebook?
HPLC Calculator ships an update every 5 weeks, and Gemini Notebook weekly. Most recently, HPLC Calculator was updated on November 3, 2026 and Gemini Notebook on November 8, 2026.

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