# Kellr vs PeakFuel

The clearest difference is in-app purchases: PeakFuel at none against Kellr's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Kellr sells 1 in-app purchase, starting at $6.99 per year. PeakFuel asks for nothing beyond the download.

Kellr ships an update every 5 days, PeakFuel every 10 days. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Kellr | PeakFuel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 10 days |
| Size | 7 MB | 77 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Michael Seidl](https://appshunter.io/developer/1881336205) | [Darius Piescheck](https://appshunter.io/developer/6797288377) |

## What reviewers say

### Kellr

[App page](https://appshunter.io/ios/app/kellr/id6759869739)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| kellr Pro | $6.99 | per year |


### PeakFuel

[App page](https://appshunter.io/ios/app/peakfuel/id6797288375)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Kellr free?

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

### Is PeakFuel free?

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

### Do Kellr or PeakFuel have ads?

Neither Kellr nor PeakFuel shows ads.

### Which is updated more often, Kellr or PeakFuel?

Kellr ships an update every 5 days, and PeakFuel every 10 days. Most recently, Kellr was updated on October 9, 2026 and PeakFuel 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.*