# e vs Kart Logger

The clearest difference is update cadence: Kart Logger at every 4 days against e's every 2 months. e's advantage is iOS requirement (15.6 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.

e ships an update every 2 months, Kart Logger every 4 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | e | Kart Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/e-sens/id1585074022/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 32 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [e-sens, Inc.](https://appshunter.io/developer/1479061797) | [Chan Bill](https://appshunter.io/developer/506424571) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-sens/id1585074022)

This tool allows water quality professionals to collect, manage, analyze, and track water quality test parameters. It is designed for water treatment facilities and professionals in the field.

**Highlights:** Water quality data collection, Data management, Analysis of test parameters, Tracking of water quality, Designed for professionals, Supports water treatment facilities

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

**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 e free?

e 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 e or Kart Logger have ads?

Neither e nor Kart Logger shows ads.

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

e ships an update every 2 months, and Kart Logger every 4 days. Most recently, e was updated on October 23, 2026 and Kart Logger on October 25, 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.*