# Wattify vs Kart Logger

The clearest difference is update cadence: Kart Logger at every 4 days against Wattify's monthly. Wattify's advantage is iOS requirement (15.1 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.

Wattify ships an update monthly, Kart Logger every 4 days. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Wattify | Kart Logger |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Size | 69 MB | 4 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wattify BV](https://appshunter.io/developer/1721711884) | [Chan Bill](https://appshunter.io/developer/506424571) |

## What reviewers say

### Wattify

[App page](https://appshunter.io/ios/app/wattify/id6474477039)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kart Logger

[App page](https://appshunter.io/ios/app/kart-logger/id6476467444)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Wattify free?

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

### Is Kart Logger free?

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

### Do Wattify or Kart Logger have ads?

Neither Wattify nor Kart Logger shows ads.

### Which is updated more often, Wattify or Kart Logger?

Wattify ships an update monthly, and Kart Logger every 4 days. Most recently, Wattify was updated on September 14, 2026 and Kart Logger on September 9, 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.*