# Invoice Maker by SPK vs Shiftin One

The clearest difference is in-app purchases: Shiftin One at none against Invoice Maker by SPK's 9. Invoice Maker by SPK's advantage is iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. Invoice Maker by SPK sells 9 in-app purchases, starting at $4.99 per month. Shiftin One asks for nothing beyond the download.

## The numbers

| Metric | Invoice Maker by SPK | Shiftin One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (906 ratings)](https://appshunter.io/ios/app/invoice-maker-by-spk/id1575877820/reviews)** | — |
| Number of ratings | **906** | — |
| Positive reviews | 73.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 60 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SPK Studios LLC](https://appshunter.io/developer/1575877822) | [Androvega](https://appshunter.io/developer/1548323217) |

## What reviewers say

### Invoice Maker by SPK

[App page](https://appshunter.io/ios/app/invoice-maker-by-spk/id1575877820)

Create and send professional PDF invoices and estimates quickly and easily. This ad-free, watermark-free app is ideal for small business owners, consultants, and freelancers on the go. Customize templates, track clients, and manage your billing efficiently.

**Highlights:** Create unlimited invoices and estimates, No ads or watermarks, Customizable invoice fields, Client list management, Multiple sharing options (email, WhatsApp, text), Convert estimates to invoices, Company logo and signature upload

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| My Invoice Generator | $4.99 | per month |
| The Invoice Maker | $7.99 | per month |
| Invoice Maker App | $9.99 | per month |
| Invoice Maker Pro | $9.99 | per month |
| Smart Invoice Maker | $39.99 | per year |
| Quick Invoice Maker | $59.99 | per year |
| Invoice Maker Professional | $69.99 | per year |
| App Invoice Maker | $89.99 | per year |
| Invoice Maker Plus | $89.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Quick and efficient
- 💡 Helpful features
- ⭐ Great app overall

**What reviewers complain about**

- 🐛 Data loss issues
- 🔒 Lack of device sync
- 📝 Limited item descriptions
- 🔧 Unreliable functionality

**Reported bugs**

- Invoices not updating correctly
- Inability to unsubscribe from paid features

**Requested features**

- Ability to sync data across devices
- Increased character limit for item descriptions
- Improved customer support


### Shiftin One

[App page](https://appshunter.io/ios/app/shiftin-one/id6794044006)

**In-app purchases:** none


## Frequently asked questions

### Is Invoice Maker by SPK free?

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

### Is Shiftin One free?

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

### Do Invoice Maker by SPK or Shiftin One have ads?

Neither Invoice Maker by SPK nor Shiftin One shows ads.

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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.*