# EFY vs AUX Service

The clearest difference is review sentiment: EFY at 86% against AUX Service's 0%. AUX Service's advantage is update cadence (fortnightly vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

EFY ships an update every 2 months, AUX Service fortnightly. The most recent releases landed on October 12, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | EFY | AUX Service |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **85.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 151 MB | 59 MB |
| Requires iOS | 15.5 | **15** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VIET NAM EFY INFORMATICS TECHNOLOGY JOINT STOCK COMPANY](https://appshunter.io/developer/1161222780) | [奥克斯智慧空调](https://appshunter.io/developer/909627326) |

## What reviewers say

### EFY

[App page](https://appshunter.io/ios/app/efy-id/id1521224305)

This platform provides organizations and individuals with timely notifications and access to state policies and important documents. Users can manage accounts, look up e-invoices, contracts, and digitally sign documents. It also offers QR code scanning for information retrieval.

**Highlights:** Account registration for EFY ecosystem, E-invoice lookup, Labor and commercial contract lookup, Digital contract signing, Electronic document lookup, QR code information lookup

**Features:** Vision Pro support

**In-app purchases:** none


### AUX Service

[App page](https://appshunter.io/ios/app/aux-service/id6473874582)

This app assists after-sales engineers with intelligent service tasks. It provides tools for managing work orders, accessing online training materials, and utilizing maintenance guidance.

**Highlights:** Work order management, Online training access, Maintenance guidance, Service process visibility, Engineer support tools

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

**In-app purchases:** none


## Frequently asked questions

### Is EFY free?

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

### Is AUX Service free?

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

### Do EFY or AUX Service have ads?

Neither EFY nor AUX Service shows ads.

### Which is updated more often, EFY or AUX Service?

EFY ships an update every 2 months, and AUX Service fortnightly. Most recently, EFY was updated on October 12, 2026 and AUX Service on October 21, 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.*