# ZiNote vs PetroTools

The clearest difference is in-app purchases: PetroTools at none against ZiNote's 5. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ZiNote sells 5 in-app purchases, starting at $4.99 per month. PetroTools asks for nothing beyond the download.

## The numbers

| Metric | ZiNote | PetroTools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zinote-research-paper-reader/id6756495932/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | Freemium | — |
| Size | 72 MB | 16 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [小双 王](https://appshunter.io/developer/1860645573) | [Oussama Mohamed El Hadi](https://appshunter.io/developer/1759705814) |

## What reviewers say

### ZiNote

[App page](https://appshunter.io/ios/app/zinote-research-paper-reader/id6756495932)

Access and organize academic papers from top research databases. Get personalized daily feeds, AI summaries, and journal tracking. Save, share, and export citations for your research library.

**Highlights:** Personalized daily research feed, Swipe to discover papers, AI summaries with offline translation, Journal tracking for 4,000+ publications, Save, share, and export citations, Organize papers in a personal library

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Early Bird Pricing | $4.99 | per month |
| ZiNote Pro Monthly | $4.99 | per month |
| ZiNote Pro Yearly | $29.99 | per year |
| Early Bird Yearly | $49.99 | per year |
| ZiNote Pro Lifetime | $69.99 | one-time |


### PetroTools

[App page](https://appshunter.io/ios/app/petrotools/id6792877304)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZiNote free?

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

### Is PetroTools free?

PetroTools is free to download, with no in-app purchases.

### Do ZiNote or PetroTools have ads?

Neither ZiNote nor PetroTools shows ads.

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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.*