# Refuel Log vs ZSGL

The clearest difference is update cadence: Refuel Log at every 2 months against ZSGL's every 6 months. ZSGL's advantage is iOS requirement (14.0.0 vs 18.0). 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.

Refuel Log ships an update every 2 months, ZSGL every 6 months. The most recent releases landed on May 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Refuel Log | ZSGL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 4 MB | 110 MB |
| Requires iOS | 18.0 | **14.0.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Florian Toenz](https://appshunter.io/developer/1598410220) | [Toni Felber](https://appshunter.io/developer/1645287364) |

## What reviewers say

### Refuel Log

[App page](https://appshunter.io/ios/app/refuel-log/id1598410218)

**In-app purchases:** none


### ZSGL

[App page](https://appshunter.io/ios/app/zsgl/id1645287362)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Refuel Log free?

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

### Is ZSGL free?

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

### Do Refuel Log or ZSGL have ads?

Neither Refuel Log nor ZSGL shows ads.

### Which is updated more often, Refuel Log or ZSGL?

Refuel Log ships an update every 2 months, and ZSGL every 6 months. Most recently, Refuel Log was updated on May 16, 2026 and ZSGL on September 10, 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.*