# GNSS Circuit Logger vs GPS Lap Timer

The clearest difference is in-app purchases: GNSS Circuit Logger at none against GPS Lap Timer's 3. GNSS Circuit Logger also leads on review sentiment (78% vs 62%) and iOS requirement (10.3 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. GPS Lap Timer sells 3 in-app purchases, starting at $3.99 per 3 months. GNSS Circuit Logger asks for nothing beyond the download.

GNSS Circuit Logger ships an update every 11 days, GPS Lap Timer every 6 days. The most recent releases landed on July 5, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | GNSS Circuit Logger | GPS Lap Timer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **77.8% of reviews** | 61.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 11 days | **Every 6 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 14 MB | 8 MB |
| Requires iOS | **10.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yuji Kanda](https://appshunter.io/developer/1244419770) | [Takao Ichimura](https://appshunter.io/developer/1474061593) |

## 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


### GPS Lap Timer

[App page](https://appshunter.io/ios/app/gps-lap-timer/id1666125803)

Accurately measure lap and sector times for race tracks using your iPhone's GPS.  This app employs proprietary algorithms for precise timing without external receivers. It saves approximately 10,000 laps and supports numerous circuits worldwide.

**Highlights:** Accurate lap and sector timing, Uses iPhone GPS, Proprietary measurement algorithms, Saves up to 10,000 laps, Supports numerous global circuits, Stand-by mode for pocket use

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Measurements | $3.99 | per 3 months |
| Unlimited Measurements | $5.99 | per year |
| Unlimited measurements | $9.99 | one-time |


## Frequently asked questions

### Is GNSS Circuit Logger free?

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

### Is GPS Lap Timer free?

GPS Lap Timer is free to download, with in-app purchases available.

### Do GNSS Circuit Logger or GPS Lap Timer have ads?

Both GNSS Circuit Logger and GPS Lap Timer show ads.

### Which is updated more often, GNSS Circuit Logger or GPS Lap Timer?

GNSS Circuit Logger ships an update every 11 days, and GPS Lap Timer every 6 days. Most recently, GNSS Circuit Logger was updated on July 5, 2026 and GPS Lap Timer on September 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.*