Comparison

KOEL iGreen vs First Calling App

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

Head to head

About

KOEL iGreen

Monitor machine health, receive critical alarms, and manage preventive maintenance schedules. This app works with a 'Plug and Play' device that connects directly to your machine's harness for real-time data.

Highlights

Machine health performance monitoring
Machine alarms and trips alerts
Preventive maintenance scheduling
Plug and Play device integration
Real-time data monitoring

Features

Read full description

1. To monitor Machine Health Performance Parameters 2. Machine Alarms & Trips 3. Preventive Maintenance Schedule KOEL iGreen RMS app works in tandem with our 'Plug and Play' device which simply plugged into your Machine harness.

About

First Calling App

Features

Read full description

At FirstCalling, we create innovative QR stickers and GPS chips that connect people instantly during emergencies — ensuring help reaches on time, even when you can't call for it yourself.

Screenshots

KOEL iGreen4 screens

First Calling App4 screens

Verdict

The call

The clearest difference is iOS requirement: First Calling App at 15.0 against KOEL iGreen's 18.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 25, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 7 level

KOEL iGreen versus First Calling App: the parameters behind the verdict, then further details
Parameter	KOEL iGreen	First Calling App
Price	Free	Free
Positive reviews	0.0% of reviews	—
Update frequency	Monthly	Monthly
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	18.0	15.0 — better
Further details — not scored
Size	24 MB	30 MB
Age rating	17+	4+
Developer	Tor.ai Limited	ROSHVEER SERVICES PRIVATE LIMITED

In-app purchases

None

KOEL iGreen

No in-app purchases

None

First Calling App

No in-app purchases

Questions

Is KOEL iGreen free?

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

Is First Calling App free?

First Calling App is free to download, with no in-app purchases.

Do KOEL iGreen or First Calling App have ads?

Neither KOEL iGreen nor First Calling App shows ads.

Which is updated more often, KOEL iGreen or First Calling App?

KOEL iGreen ships an update monthly, and First Calling App monthly. Most recently, KOEL iGreen was updated on September 25, 2026 and First Calling App on October 6, 2026.