Comparison

Volcano Geyser vs Invoice Maker Estimate Billing

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Volcano Geyser

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
Read full description

VolcanoTester turns every off-the-shelf device into a test unit using a downloadable app—it doesn’t require rooting. Eliminate the need to tether test equipment to your iOS devices because the Geyser app turns the devices into test equipment themselves. You can use Volcano for a variety of use cases, including: Network performance Device monitoring Load-testing and benchmarking And device testing Geyser works in concert with other VolcanoTester components, including Caldera (Central Controller), to perform various tests while reporting the device’s basic location and throughput information. Please note that the use of this application is only permitted and possible when you have purchased an instance of VolcanoTester and have the appropriate credentials to log in to the system. This application is not meant to be used as a standalone test tool. NEW TO VOLCANO: If you do not have a license of VolcanoTester and are interested in learning more, please contact Volcano Sales (at sales@volcanotester.com).

About

Invoice Maker Estimate Billing

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
Read full description

Create and send professional invoices, estimates, quotes and receipts in seconds on your iPhone or iPad. Invoice Maker Estimate Billing is a simple invoice maker, estimate maker and receipt maker in one invoicing app. Bill your customers, keep track of every payment and stay organized. Your data stays on your device, with no account needed. Made for small businesses, freelancers, contractors, consultants, designers, photographers, electricians, plumbers and anyone who needs a quick invoice generator or billing app on the go. EVERY DOCUMENT YOU NEED - Invoices, estimates, quotes and quotations - Receipts, credit notes and proforma invoices - Purchase orders and packing slips (delivery challans) - Automatic numbering for every document type - Convert an accepted estimate into an invoice in one tap (Pro) PROFESSIONAL INVOICE TEMPLATES - 156 invoice templates in 22 styles, from minimal and corporate to bold and creative - 7 templates are free, all 156 with Pro - Rename or hide columns and add your own columns - Brand color and fonts (Pro) - Add your logo and signature (Pro) GST INVOICES FOR INDIA - A GST invoice generator with your GSTIN and your customer's GSTIN - CGST and SGST for the same state, IGST for other states, set by place of supply - HSN/SAC codes on every item and the amount in words - HSN summary report, and GSTR-1 CSV files for the GST offline tool (Pro) SEND INVOICES AND TRACK PAYMENTS - Send invoices as PDF by email, Messages, WhatsApp or AirDrop, or print them - Record full or partial payments and see the balance due - See overdue invoices at a glance - Ask for a deposit up front - Add your bank details and a scan-to-pay QR code - Payment reminder notifications for you before and after an invoice is due (Pro) CUSTOMERS AND ITEMS - Save customers and clients with contact details, addresses and tax IDs - Build a catalog of products and services with prices, tax and discounts - Add saved customers and items to any bill without retyping REPORTS - Dashboard with revenue, payments collected and amounts outstanding - Aging report shows who owes you and how late - Client statements as PDF and CSV export for any date range (Pro) MADE FOR YOUR BUSINESS - Per-item tax and discounts - Bill in your local currency - Available in 18 languages - Built for iPad too, with your list and the open document side by side - Light and dark mode FREE AND PRO Free: - Up to 3 invoices and 3 estimates per month - 7 invoice templates - Customers, items, dashboard and aging report - GST invoices Pro unlocks everything: - Unlimited invoices, estimates and other documents - All 156 templates, brand color and fonts - Your logo and signature on documents - PDFs without the watermark - Convert estimates to invoices - Payment reminders - Report exports: CSV, GSTR-1 and client statements Pro is available as a weekly or yearly auto-renewing subscription, or as a one-time lifetime purchase. Any free trial and the price after it are shown before you confirm. Payment is charged to your Apple ID account at confirmation. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel subscriptions in your App Store account settings. Privacy Policy: https://invoicebilling.app/privacy Terms of Use: https://invoicebilling.app/terms

Screenshots

Volcano Geyser4 screens
Invoice Maker Estimate Billing4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Volcano Geyser versus Invoice Maker Estimate Billing: the parameters behind the verdict, then further details
ParameterVolcano GeyserInvoice Maker Estimate Billing
PriceFreeFree
Rating5.0 (6 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings6 — better1
Update frequencyEvery 5 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.1 — better18.2
Further details — not scored
Size27 MB15 MB
Age rating4+12+
DeveloperDCmobility LLCTilak Shakya

Customer experience

Volcano Geyser

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Invoice Maker Estimate Billing

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Volcano Geyser

No in-app purchases

3 purchases

Invoice Maker Estimate Billing

Subscriptions2
  • Invoice Pro - Weekly3 Days trial$2.997 Days
  • Invoice Pro - Yearly$29.991 Year
One-time1
  • Invoice Pro - Lifetime$44.99

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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