# STILL PreOp vs Estimate & Invoice Maker Pro

The clearest difference is price: STILL PreOp at Free against Estimate & Invoice Maker Pro's $4.99. Estimate & Invoice Maker Pro's advantage is update cadence (every 2 months vs every 7 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

STILL PreOp is free to download; Estimate & Invoice Maker Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

STILL PreOp ships an update every 7 months, Estimate & Invoice Maker Pro every 2 months. The most recent releases landed on November 11, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | STILL PreOp | Estimate & Invoice Maker Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Size | 34 MB | 14 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [CodeHero](https://appshunter.io/developer/1029552044) | [Abdulla Yasin](https://appshunter.io/developer/1407887788) |

## What reviewers say

### STILL PreOp

[App page](https://appshunter.io/ios/app/still-preop/id1206366774)

**Features:** macOS Compatibility

**In-app purchases:** none


### Estimate & Invoice Maker Pro

[App page](https://appshunter.io/ios/app/estimate-and-invoice-maker-pro/id6478950049)

**In-app purchases:** none


## Frequently asked questions

### Is STILL PreOp free?

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

### Is Estimate & Invoice Maker Pro free?

Estimate & Invoice Maker Pro costs $4.99, with no in-app purchases.

### Do STILL PreOp or Estimate & Invoice Maker Pro have ads?

Neither STILL PreOp nor Estimate & Invoice Maker Pro shows ads.

### Which is updated more often, STILL PreOp or Estimate & Invoice Maker Pro?

STILL PreOp ships an update every 7 months, and Estimate & Invoice Maker Pro every 2 months. Most recently, STILL PreOp was updated on November 11, 2026 and Estimate & Invoice Maker Pro on November 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.*