# HPLC Calculator vs Gemini Notebook

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 (#47 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.

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.

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.

## The numbers

| Metric | HPLC Calculator | Gemini Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (65K ratings)](https://appshunter.io/ios/app/gemini-notebook/id6737527615/reviews)** |
| Number of ratings | — | **65K** |
| Positive reviews | — | 77.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | **#47** |
| Size | 66 MB | 212 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Youhana Mehany](https://appshunter.io/developer/1600330996) | [Google](https://appshunter.io/developer/281956209) |

## What reviewers say

### HPLC Calculator

[App page](https://appshunter.io/ios/app/hplc-calculator/id1600330994)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.59 | per month |
| Remove Ads | $4.99 | per year |
| 50K Token Top-Up | $2.99 | one-time |
| 100K Token Top-Up | $4.99 | one-time |
| 250K Token Top-Up | $9.99 | one-time |
| 500K Token Top-Up | $12.99 | one-time |


### Gemini Notebook

[App page](https://appshunter.io/ios/app/gemini-notebook/id6737527615)

**Currently charting:** #47 Top Free · Productivity, #121 Top Grossing · Productivity (US App Store)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 GB | $1.99 | per month |
| Google AI Plus (400 GB) | $4.99 | per month |
| Google AI Plus (400 GB) | $4.99 | per month |
| Google AI Plus (2 TB) | $9.99 | per month |
| Google AI Pro (5 TB) | $19.99 | per month |
| Google AI Pro (5 TB) | $19.99 | per month |
| Google AI Plus (400 GB) | $49.99 | per year |

**What reviewers like**

- 🚀 Fast and accurate audio summaries
- 👍 Useful for learning and studying
- 🚀 Convenient mobile access
- 👍 Great for on-the-go use

**What reviewers complain about**

- 🐛 Audio volume issues
- 🔍 Missing key features from web version
- 🔍 Lack of customization options
- 🔍 Inconsistent dark mode implementation

**Reported bugs**

- Audio coming through earpiece instead of speaker
- Interactive features not working properly

**Requested features**

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


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*