# OneMessage vs ARCO Zeus

The clearest difference is rating: OneMessage at 5.0 against ARCO Zeus's 4.3. OneMessage also leads on iOS requirement (13.0 vs 15.6). ARCO Zeus's advantage is update cadence (every 6 weeks vs every 4 months) and ratings volume (6 vs 2). 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.

OneMessage holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 2 and 6 respectively.

OneMessage ships an update every 4 months, ARCO Zeus every 6 weeks. The most recent releases landed on June 1, 2026 and August 5, 2026 respectively.

## The numbers

| Metric | OneMessage | ARCO Zeus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/onemessage/id1045140760/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/arco-zeus/id6446371700/reviews) |
| Number of ratings | 2 | **6** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 26 MB | 97 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OCENS, Inc.](https://appshunter.io/developer/594265473) | [Dominic Policicchio](https://appshunter.io/developer/1710463382) |

## What reviewers say

### OneMessage

[App page](https://appshunter.io/ios/app/onemessage/id1045140760)

Send secure, reliable text messages over satellite or cellular connections, saving bandwidth and money. This app ensures private, person-to-person communication, even at sea, with a familiar interface for easy conversation tracking.

**Highlights:** Secure and reliable text messaging, Works over satellite (Iridium, Globalstar, Inmarsat) and Wi-Fi/cellular, Saves bandwidth, time, and money, Person-to-person private messaging, Message queuing for cost-effective sending, Threaded conversations

**Features:** macOS Compatibility

**In-app purchases:** none


### ARCO Zeus

[App page](https://appshunter.io/ios/app/arco-zeus/id6446371700)

Configure, control, and monitor your ARCO Smart Regulator. Customize charging profiles and safety limits for optimal system performance. Offers default profiles for quick setup or expert tuning.

**Highlights:** Configure ARCO Smart Regulator, Monitor system performance, Customize charging profiles, Set safety limits, Choose default battery profiles, Expert tuning assistance

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OneMessage free?

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

### Is ARCO Zeus free?

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

### Which has better reviews, OneMessage or ARCO Zeus?

OneMessage is rated higher. OneMessage averages 5.0 out of 5 from 2 ratings, while ARCO Zeus averages 4.3 from 6 ratings.

### Do OneMessage or ARCO Zeus have ads?

Neither OneMessage nor ARCO Zeus shows ads.

### Which is updated more often, OneMessage or ARCO Zeus?

OneMessage ships an update every 4 months, and ARCO Zeus every 6 weeks. Most recently, OneMessage was updated on June 1, 2026 and ARCO Zeus on August 5, 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.*