# EinvoiceViewer vs GPS 4G

The clearest difference is update cadence: EinvoiceViewer at every 2 weeks against GPS 4G's every 7 months. EinvoiceViewer also leads on iOS requirement (7.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

EinvoiceViewer ships an update every 2 weeks, GPS 4G every 7 months. The most recent releases landed on October 3, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | EinvoiceViewer | GPS 4G |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/einvoiceviewer/id878832797/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 7 months |
| Monetization | Free | — |
| Size | 3 MB | 99 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Vietnam Posts and Telecommunications Group](https://appshunter.io/developer/1215567249) | [Phu Nguyen](https://appshunter.io/developer/1773006125) |

## What reviewers say

### EinvoiceViewer

[App page](https://appshunter.io/ios/app/einvoiceviewer/id878832797)

This application allows users of the E-INVOICE electronic billing service to easily view, store, and search for issued electronic invoices. It provides a convenient way to manage your digital billing information.

**Highlights:** View electronic invoices, Store electronic invoices, Search electronic invoices, Manage digital billing information

**Features:** macOS Compatibility

**In-app purchases:** none


### GPS 4G

[App page](https://appshunter.io/ios/app/gps-4g/id6752840742)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EinvoiceViewer free?

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

### Is GPS 4G free?

GPS 4G is free to download, with no in-app purchases.

### Do EinvoiceViewer or GPS 4G have ads?

Neither EinvoiceViewer nor GPS 4G shows ads.

### Which is updated more often, EinvoiceViewer or GPS 4G?

EinvoiceViewer ships an update every 2 weeks, and GPS 4G every 7 months. Most recently, EinvoiceViewer was updated on October 3, 2026 and GPS 4G on September 28, 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.*