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Updated July 2026 · real, multi-region App Store reviews
Head-to-head

International Calling vs BOSS Revolution

International Calling 4.7★ · Free to download 55
Winner BOSS Revolution
BOSS Revolution 4.7★ · Free + IAP 70

BOSS Revolution is generally a more reliable option for international calls and money transfers, despite some issues with customer service and subscription management, while International Calling struggles with consistent call quality and significant problems with customer support and billing transparency.

Full reviews: International Calling · BOSS Revolution

International Calling (Yolla) offers good call quality for some users and competitive pricing, but is plagued by reports of unreliable service, billing issues, and poor customer support. BOSS Revolution, while also facing complaints about customer service and subscription practices, is praised by a larger user base for its reliability in both calling and money transfer services.

Head to head

Call Quality and Reliability edge: BOSS RevolutionR2R5R6R10
International Calling Users of International Calling (Yolla) report mixed experiences with call quality. Some praise it for good quality voice and clear sound, even for difficult-to-reach countries R2R5R17. However, a significant number of users complain about poor call quality, calls dropping unexpectedly, and difficulty hearing or being heard R6. Many also report that the app frequently freezes or calls simply don't connect R10R12.
BOSS Revolution BOSS Revolution users generally find the call quality to be reliable and clear . However, some recent reviews indicate a decline in call quality, with users experiencing busy tones, calls cutting off, or needing to try multiple times to connect . There are also reports of calls not going through despite having credit .
Pricing and Value tieR3R7R11R17
International Calling International Calling (Yolla) is described by some as having good prices and being economical, even better than Skype R11R17. However, many users report being charged significantly more than advertised rates, with some claiming to pay three times more or 25 cents per minute instead of 0.004 cents R3R7R45. There are also complaints about unexpected charges and top-up scams R25.
BOSS Revolution BOSS Revolution is generally considered economical for long-distance calls . However, some users find it too expensive . A major point of contention is the app's tendency to default to monthly subscriptions and auto-renewals, with users feeling tricked into plans they didn't intend to buy R64R84R102R112. There are also complaints about being charged for calls that don't connect .
Ease of Use and Features edge: BOSS RevolutionR2R4R12R18
International Calling International Calling (Yolla) is generally found easy to use and user-friendly by some R2. However, there are significant usability issues reported, including the app freezing frequently R12, a mandatory phone number verification process that hinders travelers R4, and problems with adding credit . Some users also find the interface terrible and are annoyed by frequent rating prompts . SMS/text messaging features are reported to be buggy or not working R18.
BOSS Revolution BOSS Revolution is praised for being fast and easy to use for calls and money transfers . However, the app has issues with language defaulting to Arabic for some users and a lack of options to delete call log history . A significant problem is the lengthy validation process for new users, taking 5-7 business days, which prevents immediate calling . Some users also report issues with logging in after changing phones .
Customer Support tieR1R8R25R35
International Calling International Calling (Yolla) receives overwhelmingly negative feedback regarding customer support. Many users report no support, bad customer service, or unhelpful responses R1R8R35R47. Some users mention being unable to get refunds for money lost due to app issues R25. A few positive experiences mention helpful and responsive representatives after initial struggles .
BOSS Revolution BOSS Revolution also faces numerous complaints about poor customer service, with users reporting unhelpful reps, long delays, and being given excuses R70R74. Some users mention difficulty canceling subscriptions or getting refunds for failed transactions R78R112. However, there are also users who praise the excellent attention and service .
Money Transfer Services edge: BOSS RevolutionR25R70R74R75
International Calling International Calling (Yolla) reviews primarily focus on calling features. There is one report of a 'top up scam' where money was charged but not received by the recipient, and no refund was issued R25.
BOSS Revolution BOSS Revolution is widely used for money transfers and is praised by many as excellent, easy, and fast R75. However, there are significant complaints about delays in money transfers, sometimes taking hours or a day, and issues with money not being sent or refunds not being issued after failed transactions R70R74R78.
Pick International Calling if

you prioritize potentially lower call rates and good call quality for specific destinations, and are willing to risk inconsistent service and poor customer support R11R17.

Pick BOSS Revolution if

you need a service for both international calls and money transfers, and value a generally reliable service with a larger user base, despite potential issues with subscriptions and occasional customer support frustrations R75.

Evidence note: International Calling (Yolla) has a much smaller number of reviews compared to BOSS Revolution, leading to less comprehensive evidence for some dimensions. Both apps have a mix of positive and negative reviews, but the negative reviews for International Calling often highlight fundamental issues like calls not connecting or money being lost without refunds, while BOSS Revolution's negatives often revolve around subscription management and customer service rather than core functionality failure.

Frequently asked

Does International Calling (Yolla) have good customer support?
No, International Calling (Yolla) generally has poor customer support, with many users reporting no support, unhelpful responses, or difficulty getting refunds for lost money R1R8R35R47.
Is BOSS Revolution reliable for money transfers?
BOSS Revolution is generally considered reliable and efficient for money transfers by many users R75, but some users experience significant delays, failed transactions, and difficulty getting refunds R70R74R78.
Are the call rates for International Calling (Yolla) accurate?
No, many users report that the advertised call rates for International Calling (Yolla) are often inaccurate, with actual charges being significantly higher, sometimes three times more or around 25 cents per minute instead of the listed 0.004 cents R3R7R45.
Does BOSS Revolution have issues with subscriptions?
Yes, BOSS Revolution frequently defaults to monthly subscriptions and auto-renewals, leading to users being charged for plans they did not intend to purchase and experiencing difficulty canceling these subscriptions R64R84R102R112.

What reviewers actually said

Built only from these 120 real reviews (foreign ones translated). Superscripts jump to the quote here. Apple has no per-review links, so [ref] opens that app's reviews on the App Store.

  1. [R2] International Calling 5/5 · US Great Honest App: Good quality voice Your balance never disappears and easy top off
  2. [R5] International Calling 5/5 · US great service!: Quality is good and this is a time that is impossible to call Iran but this service allows me to call both cell and landline with good wuality
  3. [R6] International Calling 3/5 · US Call quality: Worst quality, they can’t hear me and I have hard time to listen as well
  4. [R10] International Calling 2/5 · US Calling problems: App was great until lately it started say your call can not be completed but I have credit on my account
  5. [R3] International Calling 3/5 · US Ok: Tried for the first time. Call was clear. Call was more expensive than other apps.
  6. [R7] International Calling 1/5 · US Fake rates: Expect to pay 3 times more than the prices they list in their tariffs. Will be a surprise!
  7. [R11] International Calling 5/5 · US Ann: Amazing app, good prices. Thank you!
  8. [R17] International Calling 5/5 · US Glad I found Yolla!: Very reasonable price for international calls, and sound is very clear. Yolla is the best alternative to Skype, or even better!!
  9. [R4] International Calling 1/5 · US Waste of time. Usless: To sign up you need a working phone number that can receive texts. I'm currently traveling and just need to call a usa number. My phone doesn't work cause I'm out of the usa. This is totally useless! Like how about another form of verification? Imessage? Whatsapp? Upload and id? Nope, they don't offer any other option. If I had a working phone number I would just use that in
  10. [R12] International Calling 3/5 · US Good App, But Buggy Experience: I have been using the app for quite some time now, and I find it extremely convenient for making international calls. However, from a user experience standpoint, the application has several issues. It frequently freezes, causing disruptions in the communication process. I have encountered this problem on the latest Apple models, including the iPhone 13 Pro and the i
  11. [R18] International Calling 3/5 · US SMS Not Working: Call is working but SMS/text messaging doesn’t work. Tried multiple time but with no result. Developer, can you look into this SMS issue?
  12. [R1] International Calling 1/5 · US No support: This app has no support so not a good option.
  13. [R8] International Calling 5/5 · US Engaño, estafa y fraude!: En caso de estar en Vzla no usar. No reembolsan ni dan servicio al cliente. Pésima APP
  14. [R25] International Calling 1/5 · US Top up scam: I tried to top up two different numbers and I was charged for $4.60 but the recipient never received any credit, we contacted the local communication company and they denied receiving any top up’s, I asked Yolla to refund me , but they didn’t refund me. This was my experience don’t try to top up through them, they are scam.
  15. [R35] International Calling 2/5 · US Follow-up: Hello I have been working with Markus on your support line for weeks. I have shared logs multiple times many screenshots, installed and reinstalled the app. Tried different phone numbers to different countries and all I get back is we are working on it.
  16. [R70] BOSS Revolution 2/5 · US Ghanaians don’t use this app: If you send money it is gonna delay and I’m not talking about minutes. It takes hours, sometimes a day, and a series of calls to perform a transaction. And they’re gonna narrate a thousand stories to explain delay and none of it is gonna make any sense. This is by far the worst money transfer app I’ve used
  17. [R74] BOSS Revolution 1/5 · US Pésima app: No me envió el dinero y solo excusas eran cuando llamaba.
  18. [R75] BOSS Revolution 5/5 · US Excelente: La mejor App de envíos a RD y al mundo.
  19. [R47] International Calling 1/5 · US Bad customer service: I’m not understand how your customer service working very bad you need to fix it to your customer service
  20. [R78] BOSS Revolution 1/5 · US Scammer: They charged my bank,but the transaction didn’t went through. I talk to the support. They said the money will be returned to the bank up to 7 business days,but I never received the money. I won’t recommend it to anyone.
  21. [R45] International Calling 1/5 · US Very expensive: The information states the rate is as small as 0.004 cents per minute. However after downloading the app, deposited cash, and made a call to Ethiopia, I found out that it charges about 25 cents per minute. They are ripping compared to Boss and other.
  22. [R64] BOSS Revolution 1/5 · US Money grab harassment: The app is on every step defaulting to monthly subscriptions. You are automatically opted in. I have had to cancel subscriptions I was tricked into multiple times. then when you go to cancel they also play tricks to obfuscate the cancellation process. @apple support can do a better review of this behavior.
  23. [R84] BOSS Revolution 1/5 · US Worst service or customer support ever: I was enrolled in some kind of auto renewal plan, without be getting notified. I contacted customer support to claim that I have been charged for something I never did or enrolled for.. they are keeping saying that I did enroll.. which is ridiculous. This company is tricking customer and getting them auto enrolled in some plan automatically. Be careful being
  24. [R102] BOSS Revolution 1/5 · GB Scam Avoidd!!!!!: I used the service once and they will not stop charging me every week, auto re charge is not set up I have cancelled with my bank and unlinked my debit card from the app but still payments getting taken out!!!!
  25. [R112] BOSS Revolution 2/5 · GB Angry customer: I am not happy with your service … I have been debited twice without receiving the services you deducted my money for £9.99 was charged last month for unlike call to Nigeria from uk… it was written on the app that Nigeria is part of the country that is eligible… after payment I couldn’t call and I was charged again this month.. I am unable to cancel the subscription as it keeps bou

Synthesized from 120 recent App Store reviews · updated July 2026 · View on the App Store