# Volcano Geyser vs Invoice Maker Estimate Billing

The clearest difference is in-app purchases: Volcano Geyser at none against Invoice Maker Estimate Billing's 3. Volcano Geyser also leads on update cadence (every 5 weeks vs every 4 months) and ratings volume (6 vs 1). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Invoice Maker Estimate Billing sells 3 in-app purchases, starting at $2.99 per 7 days. Volcano Geyser asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Volcano Geyser against 5.0 for Invoice Maker Estimate Billing. That said, the two scores are not equally well evidenced: Volcano Geyser has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Volcano Geyser ships an update every 5 weeks, Invoice Maker Estimate Billing every 4 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Volcano Geyser | Invoice Maker Estimate Billing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/volcano-geyser/id1504669718/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/invoice-maker-estimate-billing/id6759962450/reviews) |
| Number of ratings | **6** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 27 MB | 15 MB |
| Requires iOS | **14.1** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [DCmobility LLC](https://appshunter.io/developer/1454395483) | [Tilak Shakya](https://appshunter.io/developer/1823223726) |

## What reviewers say

### Volcano Geyser

[App page](https://appshunter.io/ios/app/volcano-geyser/id1504669718)

This app transforms off-the-shelf devices into test units without rooting. It enables network performance monitoring, load testing, and device benchmarking, functioning as a component of a larger testing system.

**Highlights:** Device testing without rooting, Network performance monitoring, Load-testing and benchmarking, Device monitoring, Integrates with VolcanoTester components, Reports location and throughput

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice Maker Estimate Billing

[App page](https://appshunter.io/ios/app/invoice-maker-estimate-billing/id6759962450)

Easily create and send professional invoices, estimates, quotes, and receipts. Manage customer information, track payments, and generate reports. Ideal for small businesses and freelancers needing a quick billing solution on mobile.

**Highlights:** Create invoices, estimates, quotes, and receipts, Track payments and balances due, Professional invoice templates, GST invoice generation, Customer and item catalog, Generate reports on revenue and outstanding amounts

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Invoice Pro - Weekly | $2.99 | per 7 days |
| Invoice Pro - Yearly | $29.99 | per year |
| Invoice Pro - Lifetime | $44.99 | one-time |


## Frequently asked questions

### Is Volcano Geyser free?

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

### Is Invoice Maker Estimate Billing free?

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

### Which has better reviews, Volcano Geyser or Invoice Maker Estimate Billing?

Volcano Geyser and Invoice Maker Estimate Billing are both rated 5.0 out of 5 on the App Store, from 6 and 1 ratings respectively.

### Do Volcano Geyser or Invoice Maker Estimate Billing have ads?

Neither Volcano Geyser nor Invoice Maker Estimate Billing shows ads.

### Which is updated more often, Volcano Geyser or Invoice Maker Estimate Billing?

Volcano Geyser ships an update every 5 weeks, and Invoice Maker Estimate Billing every 4 months. Most recently, Volcano Geyser was updated on November 3, 2026 and Invoice Maker Estimate Billing on October 31, 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.*