# DiffOrologi vs Invoice Maker ℠

The clearest difference is in-app purchases: DiffOrologi at none against Invoice Maker ℠'s 6. DiffOrologi also leads on iOS requirement (11.0 vs 15.0). Invoice Maker ℠'s advantage is device support (4 vs 1). On price, update cadence and ads there is nothing between them.

Both are free to download. Invoice Maker ℠ sells 6 in-app purchases, starting at $9.99 per month. DiffOrologi asks for nothing beyond the download.

DiffOrologi ships an update every 2 months, Invoice Maker ℠ every 6 weeks. The most recent releases landed on September 9, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | DiffOrologi | Invoice Maker ℠ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (29 ratings)](https://appshunter.io/ios/app/invoice-maker/id6478453584/reviews)** |
| Number of ratings | — | **29** |
| Positive reviews | — | 63.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 27 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [DOING srl](https://appshunter.io/developer/423545481) | [AHAD DURRANI](https://appshunter.io/developer/1666830783) |

## What reviewers say

### DiffOrologi

[App page](https://appshunter.io/ios/app/difforologi/id974960351)

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

**In-app purchases:** none


### Invoice Maker ℠

[App page](https://appshunter.io/ios/app/invoice-maker/id6478453584)

Create professional invoices, estimates, and receipts quickly. Manage clients, track expenses, and monitor payments with a clean interface. Supports U.S. tax and discounts, with offline capabilities and optional iCloud sync.

**Highlights:** Invoice Creator & Templates, Quote & Estimate Generator, Send Bills & Receipts, PDF Export & Sharing, Client & Item Management, Tax & Discount Support, Expense Tracker, Income Dashboard

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM | $9.99 | per month |
| PREMIUM Offer | $14.99 | per year |
| PREMIUM | $29.99 | per year |
| PREMIUM | $29.99 | per year |
| LIFETIME PREMIUM | $49.99 | one-time |
| PREMIUM | $79.99 | one-time |


## Frequently asked questions

### Is DiffOrologi free?

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

### Is Invoice Maker ℠ free?

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

### Do DiffOrologi or Invoice Maker ℠ have ads?

Neither DiffOrologi nor Invoice Maker ℠ shows ads.

### Which is updated more often, DiffOrologi or Invoice Maker ℠?

DiffOrologi ships an update every 2 months, and Invoice Maker ℠ every 6 weeks. Most recently, DiffOrologi was updated on September 9, 2026 and Invoice Maker ℠ on September 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.*