Comparison

Zadarma vs JustCall

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

Head to head
About

Zadarma

This VoIP app allows you to make and receive calls and SMS using a virtual number and PBX. It offers features like call transfer, recording, and an AI voice agent to automate incoming calls. Seamlessly integrate with CRM and ERP systems for enhanced business communication.

Highlights
  • Virtual numbers and PBX
  • Call transfer
  • Call recordings
  • SMS messaging
  • AI Voice Agent
  • CRM integration
Features
Read full description

Zadarma is a simple and reliable VoIP app for making and receiving calls and SMS. Get a virtual number and PBX in one app, right on your mobile! Stay connected wherever you are with high-quality calls and affordable rates. Key Features: - Virtual numbers & PBX – get a virtual number in 110 countries and connect to your PBX directly in the app. - Call transfer – easily transfer calls to colleagues or other numbers. - Call recordings – listen to recorded calls right in the app. - SMS messaging – send and receive texts easily. - AI Voice Agent – automate incoming calls with an AI assistant that can answer questions, use your knowledge base, and transfer calls to your team when needed. Need more? Get a free Teamsale CRM already integrated with our telephony, plus seamless integration with all popular CRM and ERP systems. Zadarma also offers call tracking, website widgets, speech analytics, and more to boost your business. Learn more at zadarma.com!

About

JustCall

Establish a global presence with a local or toll-free number in over 58 countries. Manage international call centers, sales teams, and customer support efficiently. This cloud-based system requires no new hardware, allowing you to make and receive calls and SMS directly on your existing devices.

Highlights
  • Local and toll-free numbers in 58+ countries
  • International call center management
  • In-built CRM and rating system
  • Global sales team empowerment
  • SMS and call tracking
  • No new hardware required
Features
Read full description

Get a local or toll-free phone number in any of the 58 countries (including US, UK, Australia, South Africa, Japan, European countries & more) and start making & receiving calls and SMS. Create and manage your own international call center, helpdesk or global sales team within seconds and minutes. With in-built CRM, rating system and integrations, you can replace your old-school telephony systems with a new age, scalable and omni-present phone system. With a click of button, take your business global. Improve your perception and make your international clients comfortable by providing them with a local number to call. Empower your sales team to explore global sales opportunities and keep a close and real-time track of their activity and performance. You don't need any new hardware or cable or sim. All you need is a Justcall account and your phone or computer. Make calls using our app or website and receive calls directly on your phone number (without any internet requirement) Let's get started with Justcall now.

Screenshots

Zadarma4 screens
JustCall4 screens

Verdict

The call

The clearest difference is rating: JustCall at 4.4 against Zadarma's 3.3. JustCall also leads on update cadence (weekly vs every 2 months) and ratings volume (1.1K vs 69). Zadarma's advantage is monetization model (free vs freemium) and review sentiment (41% vs 26%). On price, ads, in-app purchases and device support 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

JustCall holds the better App Store score, 4.4 against 3.3. That said, the two scores are not equally well evidenced: JustCall has 1.1K ratings behind it against 69, so its average is the more settled of the two. Written reviews complicate that: 41% of Zadarma's written reviews are positive against 26% of JustCall's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Zadarma ships an update every 2 months, JustCall weekly. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

Scorecard6 real differences · 4 level
Zadarma versus JustCall: the parameters behind the verdict, then further details
ParameterZadarmaJustCall
PriceFreeFree
Rating3.3 (69 ratings)4.4 (1.1K ratings) — better
Positive reviews41.0% of reviews — better25.6% of reviews
Number of ratings691.1K — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFreemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size84 MB70 MB
Age rating4+4+
DeveloperZadarma ProjectSLABS Technologies Private Limited

Customer experience

Zadarma

All ratings69 ratings
Positive56.5%
Neutral2.9%
Negative40.6%
Written reviews166 reviews
Positive41.0%
Neutral4.2%
Negative54.8%

JustCall

All ratings1,143 ratings
Positive82.9%
Neutral4.9%
Negative12.2%
Written reviews78 reviews
Positive25.6%
Neutral7.7%
Negative66.7%

Bugs and requests

Zadarma

Not enough reviews yet to summarise bugs or requests.

JustCall

Reported bugs

4 issues
  • Texts getting truncated or not sending
  • Inability to make or receive calls at times
  • Inconsistent performance across different devices
  • Syncing issues between mobile and desktop apps

Requested features

4 requests
  • Improved group messaging functionality
  • Better integration with popular CRMs
  • Enhanced notification system for missed calls/messages
  • More customization options for user interface

In-app purchases

None

Zadarma

No in-app purchases

None

JustCall

No in-app purchases

Questions

Is Zadarma free?
Zadarma is free to download, with no in-app purchases.
Is JustCall free?
JustCall is free to download, with no in-app purchases.
Which has better reviews, Zadarma or JustCall?
JustCall is rated higher. Zadarma averages 3.3 out of 5 from 69 ratings, while JustCall averages 4.4 from 1.1K ratings.
Do Zadarma or JustCall have ads?
Neither Zadarma nor JustCall shows ads.
Which is updated more often, Zadarma or JustCall?
Zadarma ships an update every 2 months, and JustCall weekly. Most recently, Zadarma was updated on September 24, 2026 and JustCall on September 21, 2026.

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