# BTD ALARM vs Fox Pro

The clearest difference is in-app purchases: BTD ALARM at none against Fox Pro's 3. BTD ALARM also leads on ads (none vs shown) and iOS requirement (13.4 vs 15.1). Fox Pro's advantage is update cadence (every 3 weeks vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Fox Pro sells 3 in-app purchases, starting at $6.99 per 7 days. BTD ALARM asks for nothing beyond the download.

BTD ALARM ships an update every 4 months, Fox Pro every 3 weeks. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BTD ALARM | Fox Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/fox-pro-simple-invoice-maker/id6752774477/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 103 MB | 41 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BTD Service GmbH](https://appshunter.io/developer/1458349691) | [BURABICA SOFTWARE LTD](https://appshunter.io/developer/1829647330) |

## What reviewers say

### BTD ALARM

[App page](https://appshunter.io/ios/app/btd-alarm/id1458349692)

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

**In-app purchases:** none


### Fox Pro

[App page](https://appshunter.io/ios/app/fox-pro-simple-invoice-maker/id6752774477)

Create professional invoices, estimates, and quotes quickly and easily. Manage client information, track payment statuses, and sign documents directly within the app. Streamline your business paperwork and get paid faster.

**Highlights:** Create invoices, estimates, and quotes, Track payment status, Sign documents in-app, Customize with business logo, Export as PDF, Save client information

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Invoice Maker Weekly Access | $6.99 | per 7 days |
| Invoice Maker Weekly Access | $6.99 | per 7 days |
| Invoice Maker Annual Access | $99.99 | per year |


## Frequently asked questions

### Is BTD ALARM free?

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

### Is Fox Pro free?

Fox Pro is free to download, with in-app purchases available.

### Do BTD ALARM or Fox Pro have ads?

Fox Pro shows ads; BTD ALARM does not.

### Which is updated more often, BTD ALARM or Fox Pro?

BTD ALARM ships an update every 4 months, and Fox Pro every 3 weeks. Most recently, BTD ALARM was updated on October 29, 2026 and Fox Pro on October 28, 2026.

---

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