Comparison

Zadarma vs smrtPhone

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

smrtPhone

This mobile app integrates your cloud-based phone system with your CRM, enabling seamless calling, texting, and contact management from your device. It logs all communication, allows for call notes, and offers advanced sales features to accelerate your sales cycle and enhance customer relationships.

Highlights
  • CRM contact list sync
  • SMS/MMS messaging with CRM logging
  • Call logging and recording
  • In-call notes sync
  • Call disposition tracking
  • Multiple Caller ID options
  • Text and voicemail inbox access
Read full description

smrtPhone is a full featured, cloud based phone system that allows you to make more calls, send more texts, and close more deals. With smrtPhone, your phone system becomes a fully integrated part of your CRM, accelerating your sales cycle, and improving customer relationships. With no forced long-term contracts, a powerful 4-line auto-dialer, advanced Pro features, and pay-as-you-go pricing, smrtPhone is the clear choice for sales-driven businesses. Now you can bring power of smrtPhone to your mobile device. Use the smrtPhone Mobile App to: > Sync your full CRM contact lists so every contact is available from your handheld device > Send text messages (SMS and MMS) to any contact and have it automatically log in your CRM > Make and receive calls and have call data effortlessly tracked, including call recordings > Take notes during/after your call and have them automatically sync to the contact record > Choose from existing call dispositions to mark call outcomes and trigger CRM automations > Easily switch between phone number Caller IDs to ensure you call from the correct phone line > Access your text and voicemail inboxes for individual users and groups > Sync call information (including recent call logs) across platforms, web and mobile IMPORTANT: smrtPhone’s mobile app requires an existing smrtPhone account. DISCLAIMERS: Call quality can be affected by the strength of your internet/4G/5G/LTE connection. Please ensure you have a strong signal or internet connection to achieve best results. Emergency calling may not be available for your number or region.

Screenshots

Zadarma4 screens
smrtPhone4 screens

Verdict

The call

The clearest difference is rating: smrtPhone at 4.6 against Zadarma's 3.3. smrtPhone also leads on update cadence (fortnightly vs every 2 months) and ratings volume (1.4K vs 69). Zadarma's advantage is monetization model (free vs free with in-app purchases) and review sentiment (41% vs 25%). 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

smrtPhone holds the better App Store score, 4.6 against 3.3. That said, the two scores are not equally well evidenced: smrtPhone has 1.4K 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 25% of smrtPhone'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, smrtPhone fortnightly. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

Scorecard6 real differences · 4 level
Zadarma versus smrtPhone: the parameters behind the verdict, then further details
ParameterZadarmasmrtPhone
PriceFreeFree
Rating3.3 (69 ratings)4.6 (1.4K ratings) — better
Positive reviews41.0% of reviews — better24.5% of reviews
Number of ratings691.4K — better
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size84 MB54 MB
Age rating4+17+
DeveloperZadarma ProjectsmrtStudio Global Inc.

Customer experience

Zadarma

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

smrtPhone

All ratings1,397 ratings
Positive89.3%
Neutral2.9%
Negative7.8%
Written reviews53 reviews
Positive24.5%
Neutral5.7%
Negative69.8%

Bugs and requests

Zadarma

Not enough reviews yet to summarise bugs or requests.

smrtPhone

Reported bugs

4 issues
  • Constant log-outs and sign-in issues
  • Incorrect caller ID information
  • Inability to adjust notification settings
  • Syncing and integration problems with Podio

Requested features

4 requests
  • Add group messaging capability
  • Improve contacts management and search
  • Allow image/file sharing from website
  • Enhance notification and call handling

In-app purchases

None

Zadarma

No in-app purchases

None

smrtPhone

No in-app purchases

Questions

Is Zadarma free?
Zadarma is free to download, with no in-app purchases.
Is smrtPhone free?
smrtPhone is free to download, with no in-app purchases.
Which has better reviews, Zadarma or smrtPhone?
smrtPhone is rated higher. Zadarma averages 3.3 out of 5 from 69 ratings, while smrtPhone averages 4.6 from 1.4K ratings.
Do Zadarma or smrtPhone have ads?
Neither Zadarma nor smrtPhone shows ads.
Which is updated more often, Zadarma or smrtPhone?
Zadarma ships an update every 2 months, and smrtPhone fortnightly. Most recently, Zadarma was updated on September 24, 2026 and smrtPhone on September 22, 2026.

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