# OWee Delft vs Sensor Logger

The clearest difference is in-app purchases: OWee Delft at none against Sensor Logger's 6. Sensor Logger's advantage is update cadence (weekly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sensor Logger sells 6 in-app purchases, starting at $4.99 per month. OWee Delft asks for nothing beyond the download.

OWee Delft ships an update monthly, Sensor Logger weekly. The most recent releases landed on September 8, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | OWee Delft | Sensor Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (111 ratings)](https://appshunter.io/ios/app/sensor-logger/id1531582925/reviews)** |
| Number of ratings | — | **111** |
| Positive reviews | — | 44.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 82 MB | 81 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Delft University of Technology](https://appshunter.io/developer/352877212) | [Choi Tsz Hei](https://appshunter.io/developer/1531583287) |

## What reviewers say

### OWee Delft

[App page](https://appshunter.io/ios/app/owee-delft/id1521292177)

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

**In-app purchases:** none


### Sensor Logger

[App page](https://appshunter.io/ios/app/sensor-logger/id1531582925)

This app collects and displays data from various device sensors, including motion, GPS, and audio. It offers background recording, interactive plots, and multiple export formats. Advanced features allow for data streaming, systematic data collection from other users, and creating shareable data-driven dashboards.

**Highlights:** One-tap logging, Background recording, Interactive plot visualization, Data streaming (HTTP/MQTT), CSV, JSON, Excel, KML exports, Create and share data dashboards, Systematic data collection studies

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $4.99 | per month |
| Pro Monthly | $9.99 | per month |
| Ultimate Monthly | $24.99 | per month |
| Plus Yearly | $49.99 | per year |
| Pro Yearly | $99.99 | per year |
| Ultimate Yearly | $249.99 | per year |


## Frequently asked questions

### Is OWee Delft free?

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

### Is Sensor Logger free?

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

### Do OWee Delft or Sensor Logger have ads?

Neither OWee Delft nor Sensor Logger shows ads.

### Which is updated more often, OWee Delft or Sensor Logger?

OWee Delft ships an update monthly, and Sensor Logger weekly. Most recently, OWee Delft was updated on September 8, 2026 and Sensor Logger on September 23, 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.*