Comparison

OneMessage vs ARCO Zeus

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OneMessage

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
Read full description

Text Messaging – On Land or At Sea with OCENS OneMessage With OCENS OneMessage text messaging, you can easily maintain secure, reliable contact with your friends, family, or fleet while saving time, bandwidth, and money. OneMessage enables two-way, private and personal text messaging over your Wi-Fi connection through the Iridium GO! or other Iridium, Globalstar, Inmarsat satellite phones, or through a conventional cellular or Wi-Fi connection. OneMessage is person-to-person, not person-to-machine like other satellite messaging services. OneMessage ensures that texts reach only their intended recipient no matter how many devices are connected to the Wi-Fi, whether on land or at sea. Once you hit send, you can rest assured that your contacts will receive your text. Inbound messages are available for download when you connect to your sat phone, no matter where you are. Streamlined, Simple Onboard Communication Queue your messages using the OneMessage app, and then switch on your sat phone and send in seconds to save costs and minimize bandwidth usage. While you’re connected, OneMessage automatically receives any messages waiting for you on the network. Your messages appear threaded within OneMessage, just like you’d expect so that you can easily keep track of each conversation. Eliminate International Texting Fees for Good Iridium is treated as a foreign country by all cellular carriers. These carriers can charge US$15 per month or US$0.50 per message, and sometimes even apply overage rates when sending SMS messages to an Iridium phone. OneMessage users do NOT need to activate international texting service on their smartphone to send texts. With OneMessage, you get the maximum value from your satellite phone connection economically, while using an interface that feels intuitive and familiar to keep in touch no matter where you travel. Please review our Privacy Policy at http://www.ocens.com/Privacy-Policy.aspx and Terms of Use at http://downloads.ocens.com/terms-of-use.htm.

About

ARCO Zeus

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
Read full description

Setup, control, and monitor your ARCO Smart Regulator all from one location. Charging profiles and safety limits are fully customizable from the app. You can choose a default profile for your batteries to get started quickly, or work with an installation expert to tune your Smart regulator and squeeze out maximum performance from your system.

Screenshots

OneMessage4 screens
ARCO Zeus3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
OneMessage versus ARCO Zeus: the parameters behind the verdict, then further details
ParameterOneMessageARCO Zeus
PriceFreeFree
Rating5.0 (2 ratings) — better4.3 (6 ratings)
Positive reviews—50.0% of reviews
Number of ratings26 — better
Update frequencyEvery 4 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size26 MB97 MB
Age rating4+4+
DeveloperOCENS, Inc.Dominic Policicchio

Customer experience

OneMessage

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

ARCO Zeus

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

OneMessage

No in-app purchases

None

ARCO Zeus

No in-app purchases

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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