# SignFlow BSL vs Certified Safety Professional

The clearest difference is iOS requirement: Certified Safety Professional at 15.0 against SignFlow BSL's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. SignFlow BSL sells 5 one-off in-app purchases and Certified Safety Professional sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

SignFlow BSL ships an update fortnightly, Certified Safety Professional every 3 weeks. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SignFlow BSL | Certified Safety Professional |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 20 MB | 44 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Datatid AS](https://appshunter.io/developer/1800997272) | [EXAMCERT PTY LTD](https://appshunter.io/developer/1830664214) |

## What reviewers say

### SignFlow BSL

[App page](https://appshunter.io/ios/app/signflow-bsl/id6761985607)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Generous Support | $4.99 | one-time |
| SignFlow BSL Lifetime | $14.99 | one-time |
| Amazing Support | $19.99 | one-time |
| SignFlow Champion | $99.99 | one-time |


### Certified Safety Professional

[App page](https://appshunter.io/ios/app/certified-safety-professional/id6777578070)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 200 AI Credits | $1.99 | one-time |
| Unlock Premium | $5.99 | one-time |


## Frequently asked questions

### Is SignFlow BSL free?

SignFlow BSL is free to download, with in-app purchases available.

### Is Certified Safety Professional free?

Certified Safety Professional is free to download, with in-app purchases available.

### Do SignFlow BSL or Certified Safety Professional have ads?

Neither SignFlow BSL nor Certified Safety Professional shows ads.

### Which is updated more often, SignFlow BSL or Certified Safety Professional?

SignFlow BSL ships an update fortnightly, and Certified Safety Professional every 3 weeks. Most recently, SignFlow BSL was updated on October 31, 2026 and Certified Safety Professional 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.*