Flextel vs Callback24 AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flextel
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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.
Callback24 AI
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | Flextel | Callback24 AI |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 36 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 5 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | FleXtel | itDesk Sp z o.o. |
In-app purchases
Flextel
No in-app purchases
Callback24 AI
No in-app purchases
Questions
Is Flextel free?
Is Callback24 AI free?
Do Flextel or Callback24 AI have ads?
Which is updated more often, Flextel or Callback24 AI?
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