# 1Sim Connect vs Calls2Go

The clearest difference is update cadence: Calls2Go at every 3 days against 1Sim Connect's every 3 months. 1Sim Connect's advantage is iOS requirement (6.1 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 Connect ships an update every 3 months, Calls2Go every 3 days. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 1Sim Connect | Calls2Go |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/1sim-connect/id680700348/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 15 MB | 38 MB |
| Requires iOS | **6.1** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Belmont Telecom, Inc.](https://appshunter.io/developer/510353132) | [Robert Galapo](https://appshunter.io/developer/1754200809) |

## What reviewers say

### 1Sim Connect

[App page](https://appshunter.io/ios/app/1sim-connect/id680700348)

Make free calls and send free SMS messages to any OneSimCard phone worldwide. Requires a simple activation by the OneSimCard recipient. Enjoy cost-free communication with an internet connection.

**Highlights:** Free calls to OneSimCard phones, Free SMS to OneSimCard phones, Requires internet connection, Activation by recipient needed, Global communication

**Features:** macOS Compatibility

**In-app purchases:** none


### Calls2Go

[App page](https://appshunter.io/ios/app/calls2go/id6504881443)

**In-app purchases:** none


## Frequently asked questions

### Is 1Sim Connect free?

1Sim Connect is free to download, with no in-app purchases.

### Is Calls2Go free?

Calls2Go is free to download, with no in-app purchases.

### Do 1Sim Connect or Calls2Go have ads?

Neither 1Sim Connect nor Calls2Go shows ads.

### Which is updated more often, 1Sim Connect or Calls2Go?

1Sim Connect ships an update every 3 months, and Calls2Go every 3 days. Most recently, 1Sim Connect was updated on November 1, 2026 and Calls2Go on October 27, 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.*