# Invoice Maker vs Blindspot AI Devil's Advocate

The clearest difference is update cadence: Invoice Maker at weekly against Blindspot AI Devil's Advocate's every 3 weeks. Invoice Maker also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Invoice Maker sells 3 in-app purchases, starting at $5.99 per month and Blindspot AI Devil's Advocate sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

Invoice Maker ships an update weekly, Blindspot AI Devil's Advocate every 3 weeks. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Invoice Maker | Blindspot AI Devil's Advocate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (15 ratings)](https://appshunter.io/ios/app/invoice-maker-simple-pdf/id6446822833/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 1 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Collins Cheruiyot](https://appshunter.io/developer/1579009978) | [NICHOLAS ERWIN HEITKAMP](https://appshunter.io/developer/1867627286) |

## What reviewers say

### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-simple-pdf/id6446822833)

Create professional invoices and estimates quickly with customizable templates and branding options. This app is designed for freelancers and small businesses to streamline billing and get paid faster, offering offline functionality and PDF export.

**Highlights:** Create unlimited invoices and estimates, Customizable invoice templates, Add logos and business branding, Export and share as PDF, Duplicate invoices for quick edits, Works offline

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access for 1 month | $5.99 | per month |
| Unlimited access for 1 year | $29.99 | per year |
| Unlimited access forever | $89.99 | one-time |


### Blindspot AI Devil's Advocate

[App page](https://appshunter.io/ios/app/blindspot-ai-devils-advocate/id6760639146)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blindspot Pro | $14.99 | per month |
| 3 Premium Pitches | $2.99 | one-time |


## Frequently asked questions

### Is Invoice Maker free?

Invoice Maker is free to download, with in-app purchases available.

### Is Blindspot AI Devil's Advocate free?

Blindspot AI Devil's Advocate is free to download, with in-app purchases available.

### Do Invoice Maker or Blindspot AI Devil's Advocate have ads?

Neither Invoice Maker nor Blindspot AI Devil's Advocate shows ads.

### Which is updated more often, Invoice Maker or Blindspot AI Devil's Advocate?

Invoice Maker ships an update weekly, and Blindspot AI Devil's Advocate every 3 weeks. Most recently, Invoice Maker was updated on October 24, 2026 and Blindspot AI Devil's Advocate on October 17, 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.*