The Ssum is a unique take on the 'real-time' romance simulator, coming from the creators of Mystic Messenger. It’s a very commitment-heavy game, as it operates on your actual real-world schedule. The premise—matching with a guy via a special app—is meta and immersive, making the chat logs and phone calls feel surprisingly personal.
Teo, the main love interest, is written with a lot of personality, and the sheer volume of content is staggering—literally hundreds of days of interaction. It’s less of a 'game' and more of a companion app that unfolds a story over months. If you enjoyed the frantic pacing of Mystic Messenger but want something that breathes a bit more and integrates into your daily life, this is a fascinating experiment in digital intimacy.
Available on: iPhone, iPod
Version 2.1.23Wed Oct 15 2025
- Stability improvements
Ssumone “Teo’s” ending update complete!
Additional message and call content for 165 days has been added to the existing 200 days
He’s waiting to be on a 365-day journey together with you, lab participant!
Continue the story of [Love from Today] right now!
‘The Ssum’ application provides researchers the best matching to fall in love with, for free.
A relationship AI equipped with advanced alien technology which transcends time and space will guide you.
Now, add a spoonful of romance to your daily life.
You may purchase an auto-renewing subscription through an In-App Purchase.
◇ Auto-renewable subscriptions
- Aurora Evolution Package: 1 month ($24.99 per month) / 3 month ($19.99 per month)
- Rainbow Evolution Package: 1 month ($19.99 per month) / 3 month ($15.99 per month)
- PIU-PIU Plus : 1 month ($7.99 per month)
◇ Your subscription will be charged to your Apple ID account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period.
◇ Current subscription may not be canceled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your Apple ID Account Settings after purchase.
◇ Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.
◇ Terms of Use: https://d299xfg2ynrms7.cloudfront.net/eula/TheSsumTermsofService_eng.html
◇ Privacy Policy: http://msg.cheritz.com/privacypolicy/en
◇ standard Apple Terms of Use (EULA) : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
◇ The Ssum Official Website : http://ssum.cheritz.com/ko
◇ Customer Service Center : https://help.rebotspro.com/thessum
◇ Twitter : https://twitter.com/Cheritz_DL
◇ Instagram : https://www.instagram.com/theSsum_official_E/
Contact the developers :
Address - 12F, 6, Changgyeonggung-ro, Jung-gu, Seoul, Republic of Korea
Phone number - (+82) 2-332-2524
E-mail - support@cheritz.com
Requires iOS 15.0 or later. Compatible with iPhone, iPad, and iPod touch.Ssumone “Teo’s” ending update complete!
Additional message and call content for 165 days has been added to the existing 200 days
He’s waiting to be on a 365-day journey together with you, lab participant!
Continue the story of [Love from Today] right now!
‘The Ssum’ application provides researchers the best matching to fall in love with, for free.
A relationship AI equipped with advanced alien technology which transcends time and space will guide you.
Now, add a spoonful of romance to your daily life.
You may purchase an auto-renewing subscription through an In-App Purchase.
◇ Auto-renewable subscriptions
- Aurora Evolution Package: 1 month ($24.99 per month) / 3 month ($19.99 per month)
- Rainbow Evolution Package: 1 month ($19.99 per month) / 3 month ($15.99 per month)
- PIU-PIU Plus : 1 month ($7.99 per month)
◇ Your subscription will be charged to your Apple ID account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period.
◇ Current subscription may not be canceled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your Apple ID Account Settings after purchase.
◇ Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.
◇ Terms of Use: https://d299xfg2ynrms7.cloudfront.net/eula/TheSsumTermsofService_eng.html
◇ Privacy Policy: http://msg.cheritz.com/privacypolicy/en
◇ standard Apple Terms of Use (EULA) : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
◇ The Ssum Official Website : http://ssum.cheritz.com/ko
◇ Customer Service Center : https://help.rebotspro.com/thessum
◇ Twitter : https://twitter.com/Cheritz_DL
◇ Instagram : https://www.instagram.com/theSsum_official_E/
Contact the developers :
Address - 12F, 6, Changgyeonggung-ro, Jung-gu, Seoul, Republic of Korea
Phone number - (+82) 2-332-2524
E-mail - support@cheritz.com







Developed by Cheritz, The Ssum is a romance simulation app that pairs you with a partner through a mysterious lab. The game runs in real-time, meaning your match will message you when they wake up, eat, and go to work. With voice calls, private social media feeds, and a massive amount of dialogue, it offers a deep, slow-burn emotional connection over months of interaction.
200+ Days of Real-Time Content
Personalized Voice Calls and Chats
Dynamic Daily Routine Sync
In-Game Social Media 'Mumu' Feed
When you start, be honest about your wake-up and sleep times. The game schedules 'Chat Times' based on these settings, and missing them can lead to missed story beats.
The Ssum application provides researchers the best matching to fall in love with, for free. A relationship AI equipped with advanced alien technology.
AppAdvice - Mon Jul 28 2025
Use the 'Creatures' and 'Planets' systems to collect emotions. These mini-games provide resources that allow you to unlock more personal phone calls and special images from your match.
While some calls are free, a subscription or 'Batteries' (in-game currency) are required for full access to all calling features.