# EfiOil vs Billd Estimate & Invoice Maker

The clearest difference is in-app purchases: EfiOil at none against Billd Estimate & Invoice Maker's 4. EfiOil also leads on update cadence (every 10 days vs monthly). Billd Estimate & Invoice Maker's advantage is iOS requirement (14.0 vs 16.6). On price, 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. EfiOil asks for nothing beyond the download.

EfiOil ships an update every 10 days, Billd Estimate & Invoice Maker monthly. The most recent releases landed on October 19, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | EfiOil | Billd Estimate & Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Size | 19 MB | 17 MB |
| Requires iOS | 16.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [EfiData, S.L.](https://appshunter.io/developer/972434839) | [Abdulla Yasin](https://appshunter.io/developer/1407887788) |

## What reviewers say

### EfiOil

[App page](https://appshunter.io/ios/app/efioil/id972434840)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is EfiOil free?

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

### Is Billd Estimate & Invoice Maker free?

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

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

Neither EfiOil nor Billd Estimate & Invoice Maker shows ads.

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

EfiOil ships an update every 10 days, and Billd Estimate & Invoice Maker monthly. Most recently, EfiOil was updated on October 19, 2026 and Billd Estimate & Invoice Maker on October 4, 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.*