# Billd Estimate & Invoice Maker vs Proxigen

The clearest difference is in-app purchases: Proxigen at none against Billd Estimate & Invoice Maker's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Billd Estimate & Invoice Maker sells 4 in-app purchases, starting at $2.99 per month. Proxigen asks for nothing beyond the download.

Billd Estimate & Invoice Maker ships an update monthly, Proxigen every 3 weeks. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Billd Estimate & Invoice Maker | Proxigen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 17 MB | 31 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Abdulla Yasin](https://appshunter.io/developer/1407887788) | [Proxigen LLC-FZ](https://appshunter.io/developer/1826408397) |

## What reviewers say

### Billd Estimate & Invoice Maker

[App page](https://appshunter.io/ios/app/billd-estimate-and-invoice-maker/id6478083451)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Pro | $2.99 | per month |
| Three Month | $5.99 | per 3 months |
| One Year | $17.99 | per year |
| Life time - One time | $24.99 | one-time |


### Proxigen

[App page](https://appshunter.io/ios/app/proxigen/id6748585576)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Billd Estimate & Invoice Maker free?

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

### Is Proxigen free?

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

### Do Billd Estimate & Invoice Maker or Proxigen have ads?

Neither Billd Estimate & Invoice Maker nor Proxigen shows ads.

### Which is updated more often, Billd Estimate & Invoice Maker or Proxigen?

Billd Estimate & Invoice Maker ships an update monthly, and Proxigen every 3 weeks. Most recently, Billd Estimate & Invoice Maker was updated on October 4, 2026 and Proxigen on October 11, 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.*