# Fortify ERP vs Invoice Maker Easy Billing・Inv

The clearest difference is in-app purchases: Fortify ERP at none against Invoice Maker Easy Billing・Inv's 3. Fortify ERP also leads on update cadence (every 3 weeks vs every 5 months) and iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Invoice Maker Easy Billing・Inv sells 3 in-app purchases, starting at $3.99 per 7 days. Fortify ERP asks for nothing beyond the download.

Fortify ERP ships an update every 3 weeks, Invoice Maker Easy Billing・Inv every 5 months. The most recent releases landed on October 27, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Fortify ERP | Invoice Maker Easy Billing・Inv |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/invoice-maker-easy-billinginv/id6463651946/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | — | Subscription |
| Size | 31 MB | 13 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zain Ali](https://appshunter.io/developer/1582323032) | [Ishtiak Ahmed](https://appshunter.io/developer/1609971765) |

## What reviewers say

### Fortify ERP

[App page](https://appshunter.io/ios/app/fortify-erp/id1582323030)

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice Maker Easy Billing・Inv

[App page](https://appshunter.io/ios/app/invoice-maker-easy-billinginv/id6463651946)

Effortlessly create professional invoices, estimates, and receipts in seconds. This intuitive app streamlines your billing process with smart calculations, customizable templates, and secure local data storage, perfect for small businesses and freelancers.

**Highlights:** Smart invoice creation, Professional templates, Automatic calculations, Client and service management, Configurable tax and VAT, Local data storage

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $3.99 | per 7 days |
| Monthly Plan | $9.99 | per month |
| Lifetime Plan | $49.99 | one-time |


## Frequently asked questions

### Is Fortify ERP free?

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

### Is Invoice Maker Easy Billing・Inv free?

Invoice Maker Easy Billing・Inv is free to download, with in-app purchases available.

### Do Fortify ERP or Invoice Maker Easy Billing・Inv have ads?

Neither Fortify ERP nor Invoice Maker Easy Billing・Inv shows ads.

### Which is updated more often, Fortify ERP or Invoice Maker Easy Billing・Inv?

Fortify ERP ships an update every 3 weeks, and Invoice Maker Easy Billing・Inv every 5 months. Most recently, Fortify ERP was updated on October 27, 2026 and Invoice Maker Easy Billing・Inv on October 15, 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.*