# GRCatalog vs DataLogger

GRCatalog and DataLogger are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GRCatalog ships an update every 2 months, DataLogger every 4 months. The most recent releases landed on September 26, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | GRCatalog | DataLogger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (3 ratings)](https://appshunter.io/ios/app/datalogger/id611115496/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | — | Free |
| Size | 7 MB | 1 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grabba International Pty Ltd](https://appshunter.io/developer/375058083) | [MSR Electronics GmbH](https://appshunter.io/developer/611115499) |

## What reviewers say

### GRCatalog

[App page](https://appshunter.io/ios/app/grcatalog/id559618155)

**Features:** macOS Compatibility

**In-app purchases:** none


### DataLogger

[App page](https://appshunter.io/ios/app/datalogger/id611115496)

Control MSR data loggers from your mobile device. Configure loggers, view sensor data in real-time, and upload recordings to the cloud. Connects to multiple loggers via Bluetooth Low Energy.

**Highlights:** Control MSR data loggers, Configure logger settings, View sensor data online, Record sensor data, Upload data to MSR Smart Cloud, Connect via Bluetooth Low Energy (BLE)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GRCatalog free?

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

### Is DataLogger free?

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

### Do GRCatalog or DataLogger have ads?

Neither GRCatalog nor DataLogger shows ads.

### Which is updated more often, GRCatalog or DataLogger?

GRCatalog ships an update every 2 months, and DataLogger every 4 months. Most recently, GRCatalog was updated on September 26, 2026 and DataLogger on October 4, 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.*