Comparison

Ring4 vs OpusTel

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

Head to head
About

Ring4

Create a private second phone line for texting and calling without using your personal number. Ideal for online selling, dating, or business, it offers features like call recording and local area codes. Avoid roaming charges by calling over Wi-Fi.

Highlights
  • Multiple private phone lines
  • Call recording
  • Local area codes
  • Private video calling
  • Voicemail
  • Block unwanted calls
Features
Read full description

Start texting and calling on your new private line. Built for people looking for privacy, a local number, and separation between personal and public life. No carrier plan needed. Ring4 can be used like a prepaid phone card. Text, picture message, and call anywhere in the US, Canada, and UK. Avoid using your Cell phone minutes like other apps. Call and text over Wi-Fi to eliminate roaming charges when travelling. Connect a local eSIM and use your Ring4 number anywhere you have cellular data service. Add private video calling, call recording, voicemail, local area codes, and much more – MULTIPLE PHONE LINES: Set up a number for personal, business, and online selling. CALL RECORDING: Start recording on any line and RARE AREA CODES: San Francisco (415), New York (212), Los Angeles (310). What’s the best way to look like a local? Get a rare number that others can’t. Shhhh… VIDEO CALLS: Start video calls when selling online with a one-time link. Great for online selling or sharing a real estate property tour. PROTECT YOUR PRIVACY: Do you trust loyalty programs to not sell your number? You shouldn’t. Receive verification codes (2FA) and promotional messages for your favorite brands with a private second line. BLOCK CALLS: If you're done with your temporary line, or someone is bothering you, simply delete it and grab a new one. No trip to the store, questions from the salesperson, one click, and you're done. VOICEMAIL: Stay professional with a greeting that matches your private second line's purpose. SAVE CELL MINUTES & DATA: Ring4 does *NOT* use your cell phone minutes for calling, like some other apps. Connect to WiFi to make VoIP calls wherever you are. – WHY USE a 2nd PRIVATE PHONE NUMBER? -- ONLINE DATING: Use a second number to text and call without sharing your real cell phone. RENTING: Message tenants, renters, and landlords. Share a room for rent online using a private number, keeping your personal cell phone number confidential. SELLING ONLINE: Keep your cell phone off public listings by texting buyers from a second line you can silence or replace. MARKETPLACE LISTING: Never give your real cell phone number out online. LOYALTY PROGRAMS: Stop loyalty programs from selling your personal cell phone. Signup for online services with your new 2nd line. BUSINESS: Rule #1 of starting a business. Never give out your personal cell phone, and definitely do not put it on your website. This can never be undone, get a 2nd number today for your new idea, your new business before it’s too late. – NO CONTRACTS: Start with a new US or UK temporary number for 7-days. Add a monthly subscription to keep the number forever. (fair use limits apply) FREE INBOUND TEXTS & CALLING: Inbound calls and texts are always free. TRANSPARENT PRICING: Subscriptions unlock 3,000 text messages and calls a month. (counted daily) • 5 credits to start calling in the US or internationally • 5 credits to start a video meeting • 1 credit to send a text message – IMPORTANT: Emergency calls and texts to 911 are not supported. Texts to/from short codes might not always be supported. The trial may include free usage and is intended for one-time use. SUBSCRIPTION DETAILS: Subscriptions automatically renew unless cancelled 24 hours in advance and may be managed by the user in Account Settings after purchase. THE FINE PRINT: Terms of use: https://www.ring4.com/terms-and-conditions Privacy Policy: https://www.ring4.com/privacy-policy – Looking for more than 3 numbers or higher text and calling plans, visit ring4.com/business to learn about our team plans.

About

OpusTel

This app provides a real Swiss international telephone number for secure VoIP calls on iOS devices. It offers HD audio quality, free global calls between users, and call recording capabilities, all with a focus on user privacy.

Highlights
  • Real Swiss international telephone number
  • Secure VoIP calls
  • HD high-definition audio quality
  • Free global calls between users
  • Call recording
  • Conference calls
  • Automatic language selection
Read full description

OpusTel OpusTel is the mobile phone App for iPhone, iPod and iPad, permitting one to use a real Swiss international telephone number, e.g. 0041 41 520 60 00. It allows one to make and to receive secure VoIP calls from any iOS device using 5G/4G/3G/UMTS or Wi-Fi Internet connectivity. It was developed with the focus on privacy. Features: 1. Secure incoming and outgoing calls 2. Incomming calls are free of charge (no roamingcosts) 2. HD high-definition audio quality with the G722 and Opus codec 3. Free global calls from OpusTel to OpusTel 4. Easy transfer calls to any telephone number 5. Ability to record incoming and outgoing calls 6. Conference calls 7. Automatic language selection based on handy language (15 languages like EN, DE, CN, FR, ES, IT ...)

Screenshots

Ring44 screens
OpusTel4 screens

Verdict

The call

The clearest difference is rating: OpusTel at 5.0 against Ring4's 4.4. OpusTel also leads on in-app purchases (none vs 10) and review sentiment (80% vs 57%). Ring4's advantage is update cadence (every 5 weeks vs every 14 months) and ratings volume (2.9K vs 6). On price 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. Ring4 sells 10 in-app purchases, starting at $9.99 per month. OpusTel asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OpusTel holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Ring4 has 2.9K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 57% of Ring4's written reviews are positive against 80% of OpusTel's.

UpkeepUpdate frequency

Ring4 ships an update every 5 weeks, OpusTel every 14 months. The most recent releases landed on October 19, 2026 and September 29, 2026 respectively.

Scorecard8 real differences · 2 level
Ring4 versus OpusTel: the parameters behind the verdict, then further details
ParameterRing4OpusTel
PriceFreeFree
Rating4.4 (2.9K ratings)5.0 (6 ratings) — better
Positive reviews56.8% of reviews80.0% of reviews — better
Number of ratings2.9K — better6
Update frequencyEvery 5 weeks — betterEvery 14 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better16.0
Further details — not scored
Size105 MB98 MB
Age rating4+4+
DeveloperRing4, LLCOpusTel

Customer experience

Ring4

All ratings2,913 ratings
Positive82.9%
Neutral4.6%
Negative12.5%
Written reviews519 reviews
Positive56.8%
Neutral5.8%
Negative37.4%

OpusTel

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

Bugs and requests

Ring4

Reported bugs

4 issues
  • Accounts being limited or disabled for no reason
  • Credits not being properly credited
  • Inability to generate new numbers
  • Frequent app crashes and service interruptions

Requested features

3 requests
  • Ability to port numbers away from the app
  • Improve text messaging functionality
  • Provide a free trial period

OpusTel

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Ring4

Subscriptions6
  • Unlimited Talk & Text for French Mobile Phone Number - Line #1$9.991 Month
  • Unlimited Talk & Text for English Mobile Phone Number - Line #1$9.991 Month
  • Unlimited Talk & Text for US/CA Number - Line #1$9.991 Month
Show 3 more
  • Unlimited Talk & Text for US/CA Number - Line #2$9.991 Month
  • Unlimited Talk & Text for US/CA Number - Line #3$9.991 Month
  • Unlimited Talk & Text for US/CA Selected Number - Line #1$14.991 Month
One-time4
  • Package of 10 credits$0.99
  • Package of 40 credits$3.99
  • Package of 100 credits$8.99
Show 1 more
  • Package of 250 credits$19.99
None

OpusTel

No in-app purchases

Questions

Is Ring4 free?
Ring4 is free to download, with in-app purchases available.
Is OpusTel free?
OpusTel is free to download, with no in-app purchases.
Which has better reviews, Ring4 or OpusTel?
OpusTel is rated higher. Ring4 averages 4.4 out of 5 from 2.9K ratings, while OpusTel averages 5.0 from 6 ratings.
Do Ring4 or OpusTel have ads?
Neither Ring4 nor OpusTel shows ads.
Which is updated more often, Ring4 or OpusTel?
Ring4 ships an update every 5 weeks, and OpusTel every 14 months. Most recently, Ring4 was updated on October 19, 2026 and OpusTel on September 29, 2026.

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