# 1SIM VoIP vs GP UC

The clearest difference is update cadence: 1SIM VoIP at monthly against GP UC's every 31 months. GP UC's advantage is iOS requirement (12.0 vs 15.0). 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.

1SIM VoIP ships an update monthly, GP UC every 31 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 1SIM VoIP | GP UC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (87 ratings)](https://appshunter.io/ios/app/1sim-voip/id510371587/reviews)** | — |
| Number of ratings | **87** | — |
| Positive reviews | 26.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 31 months |
| Monetization | Free | — |
| Size | 86 MB | 128 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Belmont Telecom, Inc.](https://appshunter.io/developer/510353132) | [Deltapath, Inc.](https://appshunter.io/developer/1136982704) |

## What reviewers say

### 1SIM VoIP

[App page](https://appshunter.io/ios/app/1sim-voip/id510371587)

This app offers significantly reduced international calling and texting rates for existing customers. It leverages Wi-Fi or mobile data to facilitate these communications, providing a cost-effective alternative to standard roaming charges. Users need an active account and a specific enabled number to utilize its features.

**Highlights:** Reduced international call rates, Low-cost international SMS, Wi-Fi and mobile data calling, VoIP and SMS enabled Personal Extra Number, Select call routing method

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

**In-app purchases:** none


### GP UC

[App page](https://appshunter.io/ios/app/gp-uc/id1554799489)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 1SIM VoIP free?

1SIM VoIP is free to download, with no in-app purchases.

### Is GP UC free?

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

### Do 1SIM VoIP or GP UC have ads?

Neither 1SIM VoIP nor GP UC shows ads.

### Which is updated more often, 1SIM VoIP or GP UC?

1SIM VoIP ships an update monthly, and GP UC every 31 months. Most recently, 1SIM VoIP was updated on November 1, 2026 and GP UC on November 3, 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.*