# Invoices & Estimates vs Explore Proteox

The clearest difference is rating: Explore Proteox at 5.0 against Invoices & Estimates's 3.9. Explore Proteox also leads on iOS requirement (15.0 vs 26.0). Invoices & Estimates's advantage is update cadence (every 2 months vs every 6 months) and ratings volume (8 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Explore Proteox holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Invoices & Estimates has 8 ratings behind it against 1, so its average is the more settled of the two.

Invoices & Estimates ships an update every 2 months, Explore Proteox every 6 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Invoices & Estimates | Explore Proteox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (8 ratings)](https://appshunter.io/ios/app/invoices-and-estimates/id1670679663/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/explore-proteox/id6477702161/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free | Free |
| Size | 9 MB | 432 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RainbowFactory LTD](https://appshunter.io/developer/1670679665) | [Holosphere](https://appshunter.io/developer/1635956235) |

## What reviewers say

### Invoices & Estimates

[App page](https://appshunter.io/ios/app/invoices-and-estimates/id1670679663)

Create and manage professional invoices with ease. Organize items and customers, track invoice status, and customize PDFs with your logo. Supports multiple currencies and tax rates for global business.

**Highlights:** Professional invoice creation, Customer and item management, Invoice status tracking, PDF export and email sending, Customizable PDF templates, Tax/VAT rate management, Multi-currency support

**Features:** Vision Pro support

**In-app purchases:** none


### Explore Proteox

[App page](https://appshunter.io/ios/app/explore-proteox/id6477702161)

Visualize advanced cryogenic systems in augmented reality on your own device. Explore key features and details of modular dilution refrigerators to assess their suitability for your applications and lab space.

**Highlights:** Augmented reality system visualization, Life-size 3D models, Interactive component exploration, Lab space placement simulation, Customizable insert viewing, Detailed feature exploration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Invoices & Estimates free?

Invoices & Estimates is free to download, with no in-app purchases.

### Is Explore Proteox free?

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

### Which has better reviews, Invoices & Estimates or Explore Proteox?

Explore Proteox is rated higher. Invoices & Estimates averages 3.9 out of 5 from 8 ratings, while Explore Proteox averages 5.0 from 1 ratings.

### Do Invoices & Estimates or Explore Proteox have ads?

Neither Invoices & Estimates nor Explore Proteox shows ads.

### Which is updated more often, Invoices & Estimates or Explore Proteox?

Invoices & Estimates ships an update every 2 months, and Explore Proteox every 6 months. Most recently, Invoices & Estimates was updated on October 24, 2026 and Explore Proteox on October 21, 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.*