# PetroGenius vs Zengchat

The clearest difference is update cadence: Zengchat at every 9 days against PetroGenius's every 3 weeks. PetroGenius's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PetroGenius ships an update every 3 weeks, Zengchat every 9 days. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PetroGenius | Zengchat |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free | — |
| Size | 20 MB | 25 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jaiveer Singh](https://appshunter.io/developer/1424155975) | [Inderjeet Kumar](https://appshunter.io/developer/1896612834) |

## What reviewers say

### PetroGenius

[App page](https://appshunter.io/ios/app/petrogenius/id1497561911)

Manage your petrol pump's accounting and inventory with this comprehensive software. Track meter readings, lubricant sales, credit, stock levels, and more. A web app version is also available for enhanced accessibility.

**Highlights:** Accounting and inventory management, Meter reading tracking, Lubricant sales management, Credit sales tracking, DIP stock vs. actual stock comparison, Tank-wise stock management, Web app availability

**Features:** macOS Compatibility

**In-app purchases:** none


### Zengchat

[App page](https://appshunter.io/ios/app/zengchat/id6768881464)

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

**In-app purchases:** none


## Frequently asked questions

### Is PetroGenius free?

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

### Is Zengchat free?

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

### Do PetroGenius or Zengchat have ads?

Neither PetroGenius nor Zengchat shows ads.

### Which is updated more often, PetroGenius or Zengchat?

PetroGenius ships an update every 3 weeks, and Zengchat every 9 days. Most recently, PetroGenius was updated on October 8, 2026 and Zengchat on October 14, 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.*