Comparison

Flextel vs Callback24 AI

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

Head to head
About

Flextel

Features
Read full description

The Flextel Callback application lets you make calls at low Flextel rates using our amazing Callback service from your mobile, without the instability of VoIP based solutions. To enjoy the benefits, First you will need to get a Flextel phone number from http://www.flextel.com. There are thousands of UK virtual numbers to own and use - some even earn you rewards. Our Callback app features include: - Make phonecalls through the Flextel service. - Present your Flextel number on outbound calls. - Save on calls to hundreds of worldwide destinations - Easy access to contacts - View your FlexCredit balance - Call recording: all recorded phone calls are emailed to you as a sound file for saving or sharing. - This app is compatible with iPhone. For more information about this app and Flextel numbers, please visit http://www.flextel.com.

About

Callback24 AI

Features
Read full description

Callback24 AI makes it easy for customers to connect with your business. By placing clear call-to-action elements on your website or online store, visitors can leave their phone number and receive a quick callback from your team. Who is it for? - Businesses operating online that want to increase the number of conversations with customers, - Online stores looking to respond faster to buyers’ questions, - Sales and support teams that need a more efficient contact system. Key features of Callback24 AI: - more phone calls thanks to effective call-to-action prompts, - handling customer requests even outside business hours, - the ability to call back a customer in a short time, - reports and statistics that support campaign optimization, - integrations with popular systems (WordPress, PrestaShop, Magento, Shoper, Drupal, Joomla, Landingi, Google Analytics, Facebook Lead Ads, SALESmanago), - call tracking to analyze the effectiveness of sales and marketing activities. Benefits for your business: Callback24 AI helps boost sales, improve customer service quality, and simplify call management. It is a practical solution for companies that want to make the most of their customer conversations.

Screenshots

Flextel2 screens
Callback24 AI4 screens

Verdict

The call

The clearest difference is update cadence: Callback24 AI at every 2 months against Flextel's every 36 months. Flextel's advantage is iOS requirement (11.0 vs 15.6). 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.

UpkeepUpdate frequency

Flextel ships an update every 36 months, Callback24 AI every 2 months. The most recent releases landed on October 2, 2026 and September 19, 2026 respectively.

Scorecard2 real differences · 4 level
Flextel versus Callback24 AI: the parameters behind the verdict, then further details
ParameterFlextelCallback24 AI
PriceFreeFree
Update frequencyEvery 36 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.6
Further details — not scored
Size5 MB54 MB
Age rating4+4+
DeveloperFleXtelitDesk Sp z o.o.

In-app purchases

None

Flextel

No in-app purchases

None

Callback24 AI

No in-app purchases

Questions

Is Flextel free?
Flextel is free to download, with no in-app purchases.
Is Callback24 AI free?
Callback24 AI is free to download, with no in-app purchases.
Do Flextel or Callback24 AI have ads?
Neither Flextel nor Callback24 AI shows ads.
Which is updated more often, Flextel or Callback24 AI?
Flextel ships an update every 36 months, and Callback24 AI every 2 months. Most recently, Flextel was updated on October 2, 2026 and Callback24 AI on September 19, 2026.

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