# MaxFLCalc vs ShellBox OTA

The clearest difference is update cadence: ShellBox OTA at weekly against MaxFLCalc's every 4 months. ShellBox OTA also leads on iOS requirement (13.0 vs 15.1). 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.

MaxFLCalc ships an update every 4 months, ShellBox OTA weekly. The most recent releases landed on September 13, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | MaxFLCalc | ShellBox OTA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 51 MB | 33 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Bugaev](https://appshunter.io/developer/1691853251) | [黎鑫 邓](https://appshunter.io/developer/1631067636) |

## What reviewers say

### MaxFLCalc

[App page](https://appshunter.io/ios/app/maxflcalc/id6450105536)

**In-app purchases:** none


### ShellBox OTA

[App page](https://appshunter.io/ios/app/shellbox-ota/id6757002720)

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

**In-app purchases:** none


## Frequently asked questions

### Is MaxFLCalc free?

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

### Is ShellBox OTA free?

ShellBox OTA is free to download, with no in-app purchases.

### Do MaxFLCalc or ShellBox OTA have ads?

Neither MaxFLCalc nor ShellBox OTA shows ads.

### Which is updated more often, MaxFLCalc or ShellBox OTA?

MaxFLCalc ships an update every 4 months, and ShellBox OTA weekly. Most recently, MaxFLCalc was updated on September 13, 2026 and ShellBox OTA on September 21, 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.*