Comparison

1SIM VoIP vs OneSuite

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

Head to head
About

1SIM VoIP

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
Read full description

OneSim VoIP provides OneSimCard customers with an even less expensive way to make and receive international calls on their iPhone mobile phones or iPads. To use OneSim VoIP, users must have a good quality Wi-Fi, 3G, 4G or LTE Internet connection and a VoIP-enabled Personal Extra Number (PEN) activated with OneSimCard. When making an outgoing call, OneSimCard users can select the way the call will be made – either through the OneSimCard international SIM card or OneSimCard VoIP network. Calls made over the VoIP network are generally much less expensive than OneSimCard’s standard international roaming rates. Incoming calls made to the PEN will be received through low-cost VoIP if the OneSimCard phone and OneSim VoIP app are registered on the Internet. Otherwise, the call will be sent the usual way to the phone through the international SIM card. The newer version 2 of the app adds the texting feature and allows the sending and receiving texts (SMS) to and from US and Canada mobile phones over Wi-Fi or mobile data at much lower rates than regular SMS sent and received over the roaming network. The app does not require having a OneSimCard SIM installed in the phone, but it does require having a OneSimCard account and a VOIP and SMS enabled PEN. Initial settings for the app are available in the “My SIM Cards” menu of the OneSimCard online account. When in the My SIM Cards menu, select the SIM (if there are more than one on your account) and then click on the Create VoIP Account link. This will create a OneSimCard VoIP account and provide you with a link with Settings information for your iPhone or iPad. Important: Connection quality of the calls made using OneSim VoIP option over the Internet will only be as good as the quality of the Internet connection. Please be advised that in many cases this kind of connection quality is inferior to the connection quality made through the OneSimCard international SIM card roaming network.

About

OneSuite

Make affordable international calls from anywhere using your existing account. Offers multiple dialing methods for various internet conditions, including offline options. Seamlessly integrates with your contacts for easy dialing and avoids roaming charges.

Highlights
  • Cheap international calls
  • Multiple dialing methods (Internet, Callback, Local Access)
  • No PINs or access numbers
  • Integrates with device contacts
  • No roaming charges
  • Call history
  • Three-way calling
Features
Read full description

Exclusively for OneSuite users, with OR without Internet connection. Make cheap calls from anywhere to anywhere in the world with your OneSuite account. NO PINS or access number dialing. (OneSuite Broadband Access users can make calls only; OneSuite SuiteAdvantage subscribers can make AND receive calls worldwide) We’ve got you covered under ANY internet condition, without sacrificing call quality! 1. Strong Wi-Fi or data connection: Make direct calls by selecting “CALL – Internet” 2. Weak internet signal: choose Global Callback and enter two phone numbers, where you’d like OneSuite to call you back, and the number you want to call. Once we receive your request via Internet, our system will call you back via traditional phone network and connect you with the other party. 3. No internet signals? Select “Call – Local Access” button to make the call. (Currently available in U.S. 48 States only) OneSuite seamlessly integrates with your device’s contact list, for easy dialing. It allows you to make cheap international calls where ever you are, without roaming charges. - Hassel-Free: Open the OneSuite VoIP and then simply dial any destination and select your preferred dialing method. Our network verifies your user account, your account balance and continues to process the call through its duration. You can also place calls directly from your device’s Contacts. - Benefits: With this app, all your international calls will be connected via the OneSuite network through the Wi-Fi internet access on your device, so you’ll be paying only pennies per minute, debited from your prepaid OneSuite account balance. - Make free calls to other OneSuite SuiteAdvantage users. - International Coverage: Save 90% on international roaming costs! When you’re traveling outside the U.S. and Canada with free Wi-Fi access. - Call History, three-way calling, call waiting - In-app self-service Help tips Legal Note * Use of OneSuite Internet Calls with 3G or 4G may result data charges from your wireless provider. * Use of OneSuite Local Access Calls will result the use of your wireless airtime. Please ensure your wireless plan includes unlimited US 48 States. * OneSuite VoIP is not responsible for the cost of international calls made from the iPhone/iPad dialer or other applications. Therefore, if you don’t see the OneSuite VoIP header on your keypad nor do you hear OneSuite’s voice prompt when making international calls, then you know that the OneSuite VoIP app is not being used, and the call will be handled by your mobile operator at your expense.

Screenshots

1SIM VoIP3 screens
OneSuite4 screens

Verdict

The call

The clearest difference is rating: 1SIM VoIP at 4.3 against OneSuite's 3.1. 1SIM VoIP also leads on ratings volume (87 vs 17). OneSuite's advantage is iOS requirement (8.0 vs 15.0). On price, review sentiment, update cadence and ads 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

1SIM VoIP holds the better App Store score, 4.3 against 3.1. That said, the two scores are not equally well evidenced: 1SIM VoIP has 87 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 27% of 1SIM VoIP's written reviews are positive against 24% of OneSuite's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

Scorecard3 real differences · 7 level
1SIM VoIP versus OneSuite: the parameters behind the verdict, then further details
Parameter1SIM VoIPOneSuite
PriceFreeFree
Rating4.3 (87 ratings) — better3.1 (17 ratings)
Positive reviews26.7% of reviews — better23.8% of reviews
Number of ratings87 — better17
Update frequencyMonthlyMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.08.0 — better
Further details — not scored
Size86 MB40 MB
Age rating4+4+
DeveloperBelmont Telecom, Inc.OneSuite Corporation

Customer experience

1SIM VoIP

All ratings84 ratings
Positive82.1%
Neutral7.1%
Negative10.7%
Written reviews30 reviews
Positive26.7%
Neutral3.3%
Negative70.0%

OneSuite

All ratings16 ratings
Positive56.3%
Neutral6.3%
Negative37.5%
Written reviews21 reviews
Positive23.8%
Neutral4.8%
Negative71.4%

In-app purchases

None

1SIM VoIP

No in-app purchases

None

OneSuite

No in-app purchases

Questions

Is 1SIM VoIP free?
1SIM VoIP is free to download, with no in-app purchases.
Is OneSuite free?
OneSuite is free to download, with no in-app purchases.
Which has better reviews, 1SIM VoIP or OneSuite?
1SIM VoIP is rated higher. 1SIM VoIP averages 4.3 out of 5 from 87 ratings, while OneSuite averages 3.1 from 17 ratings.
Do 1SIM VoIP or OneSuite have ads?
Neither 1SIM VoIP nor OneSuite shows ads.
Which is updated more often, 1SIM VoIP or OneSuite?
1SIM VoIP ships an update monthly, and OneSuite monthly. Most recently, 1SIM VoIP was updated on November 6, 2026 and OneSuite on November 1, 2026.

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