# Zerogaspy vs Kigen Log

The clearest difference is ads: Kigen Log at none against Zerogaspy's shown. Zerogaspy's advantage is update cadence (every 2 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Zerogaspy sells 2 in-app purchases, starting at $3.99 per month and Kigen Log sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Zerogaspy ships an update every 2 days, Kigen Log monthly. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Zerogaspy | Kigen Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kigen-log-expiration-tracker/id6760212804/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | — | Freemium |
| Size | 51 MB | 43 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Quentin Manfredi](https://appshunter.io/developer/1868211141) | [Tianjin Illuso Information Technology Co., Ltd.](https://appshunter.io/developer/1864792206) |

## What reviewers say

### Zerogaspy

[App page](https://appshunter.io/ios/app/zerogaspy/id6757676680)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zerogaspy Pro Mensuel | $3.99 | per month |
| Zerogaspy Pro Annuel | $34.99 | per year |


### Kigen Log

[App page](https://appshunter.io/ios/app/kigen-log-expiration-tracker/id6760212804)

Effortlessly manage home inventory, from groceries to medications and cosmetics. This app uses AI to scan expiration dates and provides timely reminders to prevent waste and ensure safety. Organize your pantry, fridge, medicine cabinet, and beauty products with custom categories and offline data storage.

**Highlights:** AI Date Scanner, Pantry & Fridge Inventory, Skincare PAO Tracker, Medicine Cabinet Organizer, Smart Expiry Reminders, Custom Categories, 100% Offline Data

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Monthly | $2.99 | per month |
| Yearly | $14.99 | per year |
| Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Zerogaspy free?

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

### Is Kigen Log free?

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

### Do Zerogaspy or Kigen Log have ads?

Zerogaspy shows ads; Kigen Log does not.

### Which is updated more often, Zerogaspy or Kigen Log?

Zerogaspy ships an update every 2 days, and Kigen Log monthly. Most recently, Zerogaspy was updated on October 25, 2026 and Kigen Log on October 18, 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.*