Comparison

Flextel vs Callback24

Price, ratings, monetisation and update history for both apps, side by side โ€” 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

This tool helps businesses capture leads from their website by encouraging visitors to leave their phone numbers for callbacks. It aims to increase customer connections, improve sales, and optimize advertising costs.

Highlights
  • Encourages website visitors to leave phone numbers
  • Facilitates quick callbacks within 15 seconds
  • Increases customer connection rates
  • Improves customer service quality
  • Optimizes advertising costs (CPC)
  • Provides advanced reports and tracking
  • Integrates with Google Analytics and e-commerce platforms
Features
Read full description

Thanks to effective calls to action, Callback24 encourages the customer on your website / online store to leave a telephone number and contact a consultant. Are you running a business on the Internet and wondering how to get customers? Do you have your own website or online store, but customers, phones are not ringing? Or maybe you are already selling on the phone and want to show the sale? Download Callback24 and get up to 180 customers for free! And this is just the beginning! This is how Callback24 will affect your sales: - increasing the connection of the solution by 10-30% intelligent solutions to share; - customer acquisition; outside of your working hours - it will improve the quality of customer service and the effectiveness of consultants; - help optimize advertising and help cost the customer (CPC); - will show customers' shopping paths and telephone conversions; - will allow you to call back the customer within 15 seconds. Callback24 is an effective marketing tool that guarantees: - excellent call quality; - open API and integration with open systems, ie Google Analytics; - call back, incoming and outgoing; - advanced reports; - integrations - SALESmanago, Facebook Lead Ads, WordPress, PrestaShop, Magento, Shoper, Drupal, Joomla, Landingi; - Connection tracking - marking the website of the website. Install our tool on your website now and the amount of additional website website! Callback24 for shopping to buy!

Screenshots

Flextel2 screens
Callback244 screens

Verdict

The call

The clearest difference is update cadence: Callback24 at every 4 weeks against Flextel's every 36 months. Flextel's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท 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 every 4 weeks. Both last shipped on October 2, 2026.

Scorecard2 real differences ยท 6 level
Flextel versus Callback24: the parameters behind the verdict, then further details
ParameterFlextelCallback24
PriceFreeFree
Positive reviewsโ€”100.0% of reviews
Update frequencyEvery 36 monthsEvery 4 weeks โ€” better
AdsNoNo
In-app purchasesNoNo
Monetizationโ€”Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 โ€” better13.0
Further details โ€” not scored
Size5 MB46 MB
Age rating4+4+
DeveloperFleXtelitDesk Sp z o.o.

In-app purchases

None

Flextel

No in-app purchases

None

Callback24

No in-app purchases

Questions

Is Flextel free?
Flextel is free to download, with no in-app purchases.
Is Callback24 free?
Callback24 is free to download, with no in-app purchases.
Do Flextel or Callback24 have ads?
Neither Flextel nor Callback24 shows ads.
Which is updated more often, Flextel or Callback24?
Flextel ships an update every 36 months, and Callback24 every 4 weeks. Most recently, Flextel was updated on October 2, 2026 and Callback24 on October 2, 2026.

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