Comparison

AtomCall vs WattCall

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

Head to head
About

AtomCall

This messenger app offers free, high-quality voice and video calls with minimal bandwidth usage. It allows users to connect with anyone globally, even those not on the app, at low rates and supports emergency calls.

Highlights
  • Free voice and video calls
  • Low bandwidth usage
  • Direct calling to any number
  • Low-cost international calls
  • Emergency call support
  • Data saving mode
Features
Read full description

Atom Call, Anywhere, Anytime, AnySignal. Atom call is a fast growing messenger app to keep you in touch with the world. Atom Call - Atom calls, video calls and chats are FREE, clean and uninterrupted thanks to our revolutionary technologies that use less bandwidth in the world and recover lost voice and video data. In the case of an Atom Call user wanting to call someone without Atom Call soft phone, Atom Call has provided Atom Direct which directs you can contact anyone directly even if they are on a different network and even in a completely different country. Atom Direct - By using Atom Call's Atom Direct you can contact anyone directly even if they are on a different network and even in a completely different country. Atom Call's Atom Direct allows Atom users from all over the world to make calls at low rates from smartphones to landlines or mobile numbers, even if they are not using Atom call soft phone/messenger app. You can check rates for Atom Direct calls for any country. You can also place emergency calls with Atom Direct. Low Cost Usage - Atom cares about your wallet. The “Low Data Usage” tab on the app can be toggled when to save precious data when making phone calls on slow or expensive network connections. Atom is the most economical app on the market. Make high quality calls for up to 7 minutes using a single Megabyte of bandwidth which is over 6 times less data usage than other providers. Safe - All messages are safely stored on your phone, once the message is deleted it's gone forever.

About

WattCall

Make international calls over Wi-Fi or cellular data without using your cell minutes. Enjoy clear, stable voice quality and features like call recording and conference calls. Reach over 230 countries and regions with this ad-free calling solution.

Highlights
  • International calls to 230+ countries
  • Ad-free calling experience
  • Clear and stable voice quality
  • Call recording functionality
  • Up to 8-way conference calls
  • Uses internet calls (VoIP)
Features
Read full description

(1) 100% Ad-Free, foucs on calls! (2) WattCall uses an internet call (aka WiFi call, IP call, or VoIP call). Call your friends while you are under WiFi, 3G, 4G or 5G. (3) Server worldwide to ensure the best voice quality. (4) Unlike international calling cards, WattCall does not use your cell minutes. WHY USE WATTCALL: - International Calling WattCall can reach any mobile or landline number in more than 230+ countries or regions! - Clear & Stable Voice uses real telephone lines, which means we can guarantee a good crystal clear voice call quality, such as telephone calls from a landline! Duo VoPro icePro automatically detects and adjusts your connection speed to make sure more stable calls. uses rea ephone lines, which means we can guarantee a good crystal clear voice call quality, such as telephone calls from a landline! WattCall automatically detects and adjusts your connection speed to make sure more stable calls. - Call Recording Now it supports the call recording function, just tap the recording button during the call to record the call. one-tap recording, more convenient and faster to save important information during the call. - Call Conference You can hold up to 8-way call conferences with crystal-clear audio and minimal lag. - High Quality Voice Call Voice calls are sent to high quality WattCall 's dedicated VOIP network so that you do not need to worry about bad reception, volatile calls or drops. Our system always finds the best telephone line (the best voice quality) in your neighboring region when you make the call. If you have any suggestions, please feel free to contact us via: Email: duovoice@duoface.com Privacy: https://duovoice.duoface.com/privacy.html Terms: https://duovoice.duoface.com/terms.html

Screenshots

AtomCall4 screens
WattCall4 screens

Verdict

The call

The clearest difference is review sentiment: AtomCall at 82% against WattCall's 9%. AtomCall also leads on rating (4.3 vs 3.0) and in-app purchases (none vs 11). On price, update cadence, ads 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. WattCall sells 11 in-app purchases, starting at $4.99 per month. AtomCall asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AtomCall holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: AtomCall has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 82% of AtomCall's written reviews are positive against 9% of WattCall's.

UpkeepUpdate frequency

AtomCall ships an update every 4 weeks, WattCall every 2 weeks. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 4 level
AtomCall versus WattCall: the parameters behind the verdict, then further details
ParameterAtomCallWattCall
PriceFreeFree
Rating4.3 (12 ratings) — better3.0 (2 ratings)
Positive reviews81.8% of reviews — better9.1% of reviews
Number of ratings12 — better2
Update frequencyEvery 4 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better12.0
Further details — not scored
Size173 MB107 MB
Age rating4+12+
DeveloperThe Angel Organisation LtdJUSI PTE.LTD.

Customer experience

AtomCall

All ratings12 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews11 reviews
Positive81.8%
Neutral0.0%
Negative18.2%

WattCall

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews11 reviews
Positive9.1%
Neutral0.0%
Negative90.9%

In-app purchases

None

AtomCall

No in-app purchases

11 purchases

WattCall

Subscriptions1
  • Duo Voice Pro Monthly Premium3 Days trial$4.991 Month
One-time10
  • Credits of $0.99$0.99
  • Duo Voice Pro Credits 16500$0.99
  • Duo Voice Pro Credits 13500$0.99
Show 7 more
  • Credits of $1.99$1.99
  • Duo Voice Pro Credits 27000$1.99
  • Credit of $4.99$4.99
  • Duo Voice Pro Credits 67500$4.99
  • Credits of $9.99$9.99
  • Duo Voice Pro Credits 135000$9.99
  • Duo Voice Pro Credits 300000$19.99

Questions

Is AtomCall free?
AtomCall is free to download, with no in-app purchases.
Is WattCall free?
WattCall is free to download, with in-app purchases available.
Which has better reviews, AtomCall or WattCall?
AtomCall is rated higher. AtomCall averages 4.3 out of 5 from 12 ratings, while WattCall averages 3.0 from 2 ratings.
Do AtomCall or WattCall have ads?
Neither AtomCall nor WattCall shows ads.
Which is updated more often, AtomCall or WattCall?
AtomCall ships an update every 4 weeks, and WattCall every 2 weeks. Most recently, AtomCall was updated on September 18, 2026 and WattCall on September 24, 2026.

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