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Digital products
for digital leader.

T-Mobile is a leading network provider in Czech Republic with 6+ million customers. We're aiming to become a digital leader, too. I'm contributing to this goal by creating digital products focused on engagement & upsell across all digital touchpoints, mainly T-Mobile App. 

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AppStore rating
up from 4.4


Users rating our activations 4 or 5 stars

2+ million

Customers managing their
services in the app



Best rated telco
app on the market

Holidays '23

Holiday season is live - in fact, more alive than ever, because it wouldn't be us if we didn't try something new and one-up ourselves each time. And since we know that motion design enhances engagement and interest, I rolled my sleeves, learnt some new tricks, and added a little splash of snowflake-inspired animations to our propositions.

Read more about design & impact (LinkedIn article)

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Almost 4/5
of users browsed
through all the offers

up to 30%

CTR rates 
on offers
up to 30.4%



CTR rates 
were 3x higher than
the same offers on web


The Runaway Eggs

We've improved the follow up to our Telekom Award winning Easter campaign in every way. What stayed the same is the core concept - 5 eggs hidden in different parts of the app to highlight new features or updates; find all 5 of them to win interesting prizes. On top of this, we've added a chance to win in all of the eggs, included new elements like mini games, extended the hunt to social media contest, or hid one egg in our stores to boost foot traffic and sales.

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215 000

More than 215 000 users took part, 35% of them returned repeatedly


Increase in engaged T-Bot sessions, resulting in 1-star improvment in its rating

1.2 million

Mini-games played, one of which averaged 21 replays per user


Comments in social media contest - our highest number ever


5 Week Challenge

Supporting our customers' New Year resolutions by providing achievable goals, tips and useful partners' benefits to help them get there. Each week, they could get a digital badge in 5 categories - Exercise, Food, Money, Well-being and Family & Friends. Users completing all 5 challenges could win Apple Watch.


300 000+

App traffic


32 000

More than 300 000 users took part, 33% of them returned repeatedly

Almost reached Holiday campaign and prevented post-holidays decline

We saw 8% MoM increase in Net Promoter Score during the activation

Among 300k completed tasks, most common was "I'll take more steps"


Holidays '22

The digital-only star of T-Mobile Holiday campaign is our Advent Calendar, where we offer customers little surprises every day, ranging from smaller gifts like custom-designed wallpapers, digital postcards, coloring pictures or bedtime story to entertain kids, to bigger deals including 50% discounts for screen protectors for your new phone, giveaways of iPhones, TVs and free unlimited tariffs. 

Read the full story behind this activation

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600 000+

Users visited our Advent Calendar during the month


Users have been returning to the app 15% more often than during 2021 holidays


Daily average visits in T-Mobile up were 3x higher


Twice as much benefits claimed compared to other seasons

Summer Game

This time we wanted to try something a little different – with Easter Egg Hunt we learned that a whopping 41% played only for the fun of it. This has made our hands a little more free to try different approach – more focused on enjoyment and fun instead of "just" giving away prizes. So for the summer we prepared a set of 3 stories, where users decided what happens next and collected items along the way. And it turned out to be yet another hit with our customers.

Learn more about the game design

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275 000




More than 275k players, 1/3 of which returned repeatedly

Users who entered the game also finished the levels

Active users of T-Mobile App during the game

Of users who found promocode for our TV service redeemed it


Playful Easter

The drivers of change are engaged and empowered users who get most of our products and services, which leads to doing business without actually doing business. We at T-Mobile decided to double-down our efforts on engagement campaigns, and this Easter campaign activation was an exciting and effective way to promote new features of the T-Mobile app, while also giving users a chance to win interesting prizes.

Learn more about the award winning product






More daily active and returning users during campaign

We saw 11.5% MoM increase in Net Promoter Score during the activation

More prepaid sales by promoting top-up rewards in one of the eggs

Users who played rated
the Playful Easter campaign 4 or 5 stars

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