Comparison

TC Mobile I/O vs SERSA Zeit

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

Head to head

About

TC Mobile I/O

Control your TC MOBILE I/O X200 SMS relay with this application. It displays device status and sends commands, eliminating the need for manual SMS writing. Access datasheets and switch between German and English languages.

Highlights

Device status indication
Send switching commands
Eliminates manual SMS writing
Data sheet download
Multilingual support (German, English)

Features

Read full description

This app supports you in using the TC MOBILE I/O X200 SMS relay (firmware version 2.0 or later). It indicates the device status, and sends the switching commands – the manual writing of SMS is no longer necessary. Other functions and features: - Data sheet download - Languages: German, English

About

SERSA Zeit

Read full description

Die Sersa Zeiterfassung APP ermöglicht es Buchungen auf Projekte, Abwesenheits- und Spesenbuchungen durchzuführen. Ohne Papier von überall und jederzeit. Die Daten fliessen direkt ins ERP. Zudem warnt sie bei Pausenunterschreitungen und Zeitüberschneidungen. Die optimierte Tageseingabe ermöglicht zudem einen ganzen Tag auf einen Schlag einzugeben (samt Reisezeit & Spesen).

Screenshots

TC Mobile I/O4 screens

SERSA Zeit1 screens

Verdict

The call

TC Mobile I/O and SERSA Zeit are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

TC Mobile I/O ships an update every 28 months, SERSA Zeit every 20 months. Both last shipped on November 2, 2026.

ScorecardNo meaningful differences

TC Mobile I/O versus SERSA Zeit: the parameters behind the verdict, then further details
Parameter	TC Mobile I/O	SERSA Zeit
Price	Free	Free
Positive reviews	100.0% of reviews	—
Update frequency	Every 28 months	Every 20 months — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	11.0.0	11.0
Further details — not scored
Size	12 MB	2 MB
Age rating	4+	4+
Developer	Phoenix Contact GmbH & Co. KG	all4net GmbH

In-app purchases

None

TC Mobile I/O

No in-app purchases

None

SERSA Zeit

No in-app purchases

Questions

Is TC Mobile I/O free?

TC Mobile I/O is free to download, with no in-app purchases.

Is SERSA Zeit free?

SERSA Zeit is free to download, with no in-app purchases.

Do TC Mobile I/O or SERSA Zeit have ads?

Neither TC Mobile I/O nor SERSA Zeit shows ads.

Which is updated more often, TC Mobile I/O or SERSA Zeit?

TC Mobile I/O ships an update every 28 months, and SERSA Zeit every 20 months. Most recently, TC Mobile I/O was updated on November 2, 2026 and SERSA Zeit on November 2, 2026.