# 1Kosmos vs CallHarbor Messenger

The clearest difference is update cadence: 1Kosmos at monthly against CallHarbor Messenger's every 17 months. 1Kosmos also leads on ratings volume (432 vs 2). CallHarbor Messenger's advantage is rating (5.0 vs 4.8) and iOS requirement (14.0 vs 16.0). 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.

CallHarbor Messenger holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 1Kosmos has 432 ratings behind it against 2, so its average is the more settled of the two.

1Kosmos ships an update monthly, CallHarbor Messenger every 17 months. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 1Kosmos | CallHarbor Messenger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (432 ratings)](https://appshunter.io/ios/app/1kosmos/id1539421428/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/callharbor-messenger/id6740438233/reviews)** |
| Number of ratings | **432** | 2 |
| Positive reviews | 51.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 17 months |
| Monetization | Free | Free |
| Size | 54 MB | 52 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [1Kosmos Inc.,](https://appshunter.io/developer/314249575) | [Active Solutions Group, Inc.](https://appshunter.io/developer/1222134241) |

## What reviewers say

### 1Kosmos

[App page](https://appshunter.io/ios/app/1kosmos/id1539421428)

Securely access digital services without passwords using advanced biometrics and a privacy-first approach. This app automates identity proofing, provides a digital wallet for passwordless logins, and gives you control over your personal data.

**Highlights:** Passwordless authentication, Biometric identity verification, Digital identity wallet, Automated identity proofing, Data privacy control, Secure account access

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

**In-app purchases:** none


### CallHarbor Messenger

[App page](https://appshunter.io/ios/app/callharbor-messenger/id6740438233)

Send and receive text and picture messages using your dedicated business phone number. Access your conversations from multiple devices and allow your team to manage incoming messages from a single business number.

**Highlights:** Send/receive texts from business number, Supports picture messages, Use on multiple devices, Web browser access, Team access to shared numbers

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 1Kosmos free?

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

### Is CallHarbor Messenger free?

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

### Which has better reviews, 1Kosmos or CallHarbor Messenger?

CallHarbor Messenger is rated higher. 1Kosmos averages 4.8 out of 5 from 432 ratings, while CallHarbor Messenger averages 5.0 from 2 ratings.

### Do 1Kosmos or CallHarbor Messenger have ads?

Neither 1Kosmos nor CallHarbor Messenger shows ads.

### Which is updated more often, 1Kosmos or CallHarbor Messenger?

1Kosmos ships an update monthly, and CallHarbor Messenger every 17 months. Most recently, 1Kosmos was updated on November 7, 2026 and CallHarbor Messenger on November 4, 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.*