# GNSS Circuit Logger vs GRÆS

The clearest difference is in-app purchases: GNSS Circuit Logger at none against GRÆS's 2. GNSS Circuit Logger also leads on device support (3 vs 1) and iOS requirement (10.3 vs 16.0). GRÆS's advantage is update cadence (every 3 days vs every 11 days). On price and ads there is nothing between them.

Both are free to download. GRÆS sells 2 in-app purchases, starting at $1.99 per month. GNSS Circuit Logger asks for nothing beyond the download.

GNSS Circuit Logger ships an update every 11 days, GRÆS every 3 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | GNSS Circuit Logger | GRÆS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 11 days | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 14 MB | 4 MB |
| Requires iOS | **10.3** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuji Kanda](https://appshunter.io/developer/1244419770) | [KOHDAI Yamada](https://appshunter.io/developer/1894252254) |

## What reviewers say

### GNSS Circuit Logger

[App page](https://appshunter.io/ios/app/gnss-circuit-logger/id1435155551)

This application functions as a lap timer for circuit driving, utilizing GNSS technology. It supports various BLE devices for data logging and offers CSV, NMEA, and GPX output formats for lap times.

**Highlights:** GNSS lap timer for circuit driving, BLE device compatibility (LNS and QSTARZ protocols), CSV, NMEA, GPX lap time output, Data logging for circuit racing

**Features:** macOS Compatibility

**In-app purchases:** none


### GRÆS

[App page](https://appshunter.io/ios/app/grs/id6762465439)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GRAES Pro（月額） | $1.99 | per month |
| GRAES Pro（年額） | $14.99 | per year |


## Frequently asked questions

### Is GNSS Circuit Logger free?

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

### Is GRÆS free?

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

### Do GNSS Circuit Logger or GRÆS have ads?

Both GNSS Circuit Logger and GRÆS show ads.

### Which is updated more often, GNSS Circuit Logger or GRÆS?

GNSS Circuit Logger ships an update every 11 days, and GRÆS every 3 days. Most recently, GNSS Circuit Logger was updated on November 2, 2026 and GRÆS on October 31, 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.*