# Sunline vs GPSLink US

The clearest difference is iOS requirement: Sunline at 11.1 against GPSLink US's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Sunline ships an update every 4 months, GPSLink US every 2 months. The most recent releases landed on September 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Sunline | GPSLink US |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/sunline/id1494807667/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 7 MB | 26 MB |
| Requires iOS | **11.1** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Drift Innovation Ltd](https://appshunter.io/developer/579007701) | [Tamilarasan Kannan](https://appshunter.io/developer/1500116258) |

## What reviewers say

### Sunline

[App page](https://appshunter.io/ios/app/sunline/id1494807667)

This device combines inverter, solar charger, and battery charger functions for portable, uninterruptible power. Its LCD display allows easy configuration of charging current, power source priority, and input voltage.

**Highlights:** Multi-function inverter/charger, Solar charger capability, Battery charger capability, Uninterruptible power support, Comprehensive LCD display, User-configurable settings

**Features:** macOS Compatibility

**In-app purchases:** none


### GPSLink US

[App page](https://appshunter.io/ios/app/gpslink-us/id6760927627)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sunline free?

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

### Is GPSLink US free?

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

### Do Sunline or GPSLink US have ads?

Neither Sunline nor GPSLink US shows ads.

### Which is updated more often, Sunline or GPSLink US?

Sunline ships an update every 4 months, and GPSLink US every 2 months. Most recently, Sunline was updated on September 10, 2026 and GPSLink US on October 6, 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.*