Comparison

C365 Ultra vs E4 Flex

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

Head to head

c365

Manage E4 Flex with BLE

Free

📊 Productivity

★ 5.01 ratingsView app →

About

C365 Ultra

Features

Read full description

c365 is a multipurpose mobile application for time tracking, collaboration, productivity and e-learning platform for students, customers, individuals and self-managed teams.

About

E4 Flex

This app enables field technicians to connect to and manage E4 Flex readers via Bluetooth Low Energy. It allows for sending commands and receiving responses, facilitating configuration and testing of the readers.

Highlights

Connect to E4 Flex readers via BLE
Send commands to readers
Receive responses from readers
Configure E4 Flex readers
Test E4 Flex readers

Read full description

The E4 Flex allows users to find and connect to E4 Flex readers in close proximity using the BLE interface. The user can send commands and receive responses as if they were connected using the typical serial or network connect. This app is a new tool for field technicians to configure and test the E4 Flex Reader.

Screenshots

C365 Ultra4 screens

E4 Flex3 screens

Verdict

The call

The clearest difference is update cadence: C365 Ultra at every 11 days against E4 Flex's every 21 months. 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

C365 Ultra ships an update every 11 days, E4 Flex every 21 months. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.

Scorecard1 real difference · 8 level

C365 Ultra versus E4 Flex: the parameters behind the verdict, then further details
Parameter	C365 Ultra	E4 Flex
Price	Free	Free
Rating	—	5.0 (1 ratings) — better
Number of ratings	—	1 — better
Update frequency	Every 11 days — better	Every 21 months
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	14.0	13.1 — better
Further details — not scored
Size	89 MB	1 MB
Age rating	4+	4+
Developer	NIRVASOFT PTE. LTD.	Paul Hamel

In-app purchases

None

C365 Ultra

No in-app purchases

None

E4 Flex

No in-app purchases

Questions

Is C365 Ultra free?

C365 Ultra is free to download, with no in-app purchases.

Is E4 Flex free?

E4 Flex is free to download, with no in-app purchases.

Do C365 Ultra or E4 Flex have ads?

Neither C365 Ultra nor E4 Flex shows ads.

Which is updated more often, C365 Ultra or E4 Flex?

C365 Ultra ships an update every 11 days, and E4 Flex every 21 months. Most recently, C365 Ultra was updated on October 14, 2026 and E4 Flex on October 20, 2026.