Comparison

Kalliope CTI vs eSignApp

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

Head to head
About

Kalliope CTI

This app provides mobile access to your business phone system, allowing you to make and receive calls using your company lines from anywhere. It offers two modes: Call-Back for GSM quality calls masked by your company number, and Softphone for direct IP registration.

Highlights
  • Access business phone system on mobile
  • Call-Back mode via GSM
  • Softphone mode for IP registration
  • Integrated SIP Client
  • Call notification when app is off/standby
  • Manage VoIP calls natively
Features
Read full description

************************************ Product requires a KalliopePBX® V4 Minimum firmware version: 4.10.2 Recommended firmware version: 4.11.7+ Kalliope CTI Phone / Pro license required* ************************************ RC version. KalliopePBX® in your pocket! You no longer risk being unreachable!
 For those who need to be always available, Kalliope has designed the KCTI mobile app for iOS® systems. Telephone and UC services can also be accessed outside the office, using the extension number and using company lines. The Mobile App offers the freedom to choose how to manage your calls based on the availability of data traffic: • Call-Back mode: the mobile app allows you to manage incoming and outgoing calls
through the user's SIM, then in GSM mode, using the company lines attested to KalliopePBX®. The call will have the same quality as a normal mobile phone call without any cost on the mobile phone contract and will be masked by the company's geographical number. • Softphone mode: the user uses the smartphone like an extension. KalliopeCTI Mobile will allow the smartphone to register directly on KalliopePBX® like any IP client. The softphone mode therefore offers:
 • Integrated SIP Client
 • Integrated native libraries to ensure softphone reachability even when the terminal is in standby.
 • Call notification with app turned off or in stand-by mode
 • Management of VoIP calls in native way * A KCTI Pro license is required to use the GSM ™ mode only. For the use of both modes, GSM ™ and Softphone, a KCTI Phone license is required instead

About

eSignApp

Features
Read full description

eSignApp è l'applicazione per la “firma digitale remota” dei notai sviluppata da Notartel per conto del Consiglio Nazionale del Notariato (CNN). Progettata esclusivamente per i notai italiani, consente di firmare documenti direttamente da smartphone e tablet.

Screenshots

Kalliope CTI2 screens
eSignApp4 screens

Verdict

The call

The clearest difference is update cadence: Kalliope CTI at every 2 months against eSignApp's every 45 months. Kalliope CTI also leads on iOS requirement (12.0 vs 18.6). On price, ads, in-app purchases and device support 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

Kalliope CTI ships an update every 2 months, eSignApp every 45 months. The most recent releases landed on September 22, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 6 level
Kalliope CTI versus eSignApp: the parameters behind the verdict, then further details
ParameterKalliope CTIeSignApp
PriceFreeFree
Positive reviews10.0% of reviews—
Update frequencyEvery 2 months — betterEvery 45 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreemium—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better18.6
Further details — not scored
Size46 MB3 MB
Age rating4+4+
DeveloperKalliope srlNotartel S.p.A.

In-app purchases

None

Kalliope CTI

No in-app purchases

None

eSignApp

No in-app purchases

Questions

Is Kalliope CTI free?
Kalliope CTI is free to download, with no in-app purchases.
Is eSignApp free?
eSignApp is free to download, with no in-app purchases.
Do Kalliope CTI or eSignApp have ads?
Neither Kalliope CTI nor eSignApp shows ads.
Which is updated more often, Kalliope CTI or eSignApp?
Kalliope CTI ships an update every 2 months, and eSignApp every 45 months. Most recently, Kalliope CTI was updated on September 22, 2026 and eSignApp on October 3, 2026.

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