# SureCall Horizon vs Approval Studio

The clearest difference is update cadence: Approval Studio at every 10 months against SureCall Horizon's every 27 months. SureCall Horizon's advantage is iOS requirement (12.0 vs 18.4). 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.

SureCall Horizon ships an update every 27 months, Approval Studio every 10 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SureCall Horizon | Approval Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 10 months** |
| Size | 30 MB | 3 MB |
| Requires iOS | **12.0** | 18.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [SureCall, Inc](https://appshunter.io/developer/1233069729) | [HiTech Service](https://appshunter.io/developer/1124417233) |

## What reviewers say

### SureCall Horizon

[App page](https://appshunter.io/ios/app/surecall-horizon/id1603381579)

**Features:** macOS Compatibility

**In-app purchases:** none


### Approval Studio

[App page](https://appshunter.io/ios/app/approval-studio/id6747336607)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SureCall Horizon free?

SureCall Horizon is free to download, with no in-app purchases.

### Is Approval Studio free?

Approval Studio is free to download, with no in-app purchases.

### Do SureCall Horizon or Approval Studio have ads?

Neither SureCall Horizon nor Approval Studio shows ads.

### Which is updated more often, SureCall Horizon or Approval Studio?

SureCall Horizon ships an update every 27 months, and Approval Studio every 10 months. Most recently, SureCall Horizon was updated on October 25, 2026 and Approval Studio on October 28, 2026.

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