# Invoice Maker | Bill Estimator vs GEST Ops

The clearest difference is in-app purchases: GEST Ops at none against Invoice Maker | Bill Estimator's 4. GEST Ops also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Invoice Maker | Bill Estimator sells 4 in-app purchases, starting at $1.99 per 7 days. GEST Ops asks for nothing beyond the download.

Invoice Maker | Bill Estimator ships an update monthly, GEST Ops every 3 weeks. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Invoice Maker | Bill Estimator | GEST Ops |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 72 MB | 24 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Code Stars](https://appshunter.io/developer/1751123919) | [Vigtech](https://appshunter.io/developer/1451027901) |

## What reviewers say

### Invoice Maker | Bill Estimator

[App page](https://appshunter.io/ios/app/invoice-maker-bill-estimator/id6477352177)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium Subscription | $1.99 | per 7 days |
| Monthly Premium Subscription | $4.99 | per month |
| Quarterly Premium Subscription | $12.99 | per 3 months |
| Yearly Premium Subscription | $29.99 | per year |


### GEST Ops

[App page](https://appshunter.io/ios/app/gest-ops/id6741061825)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Invoice Maker | Bill Estimator free?

Invoice Maker | Bill Estimator is free to download, with in-app purchases available.

### Is GEST Ops free?

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

### Do Invoice Maker | Bill Estimator or GEST Ops have ads?

Invoice Maker | Bill Estimator shows ads; GEST Ops does not.

### Which is updated more often, Invoice Maker | Bill Estimator or GEST Ops?

Invoice Maker | Bill Estimator ships an update monthly, and GEST Ops every 3 weeks. Most recently, Invoice Maker | Bill Estimator was updated on September 10, 2026 and GEST Ops on September 17, 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.*