# Flextel vs Callback24

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.

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 every 4 weeks. Both last shipped on October 2, 2026.

## The numbers

| Metric | Flextel | Callback24 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 4 weeks** |
| Monetization | — | Free |
| Size | 5 MB | 46 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FleXtel](https://appshunter.io/developer/352558288) | [itDesk Sp z o.o.](https://appshunter.io/developer/1509266216) |

## What reviewers say

### Flextel

[App page](https://appshunter.io/ios/app/flextel-callback/id970392858)

**Features:** macOS Compatibility

**In-app purchases:** none


### Callback24

[App page](https://appshunter.io/ios/app/callback24/id1543407095)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*