Shinkai Haru is an ordinary first year in middle school. But one day, the search app Appmon, Gatchmon, jumps out of his phone! Who'd have thought that there were App Monsters living inside your smartphone?!

The dates of December 24th and 25th disappear from smartphone calendars worldwide! Ai is despondent at the thought that the Kashinoki Books Christmas celebration might not go through. But just then, Gatchmon sees something!

It's a grand rally for all the Appmon who've appeared so far! The Appmon ranking tournament begins, featuring... a 100 meter dash, karuta, and a portrait competition?! Who will be declared the ultimate Appmon?!

Video game characters are causing chaos in IOT devices everywhere! Haru finds that a common link behind the rampages is a character from a monster-raising RPG he played as a child...

The Fujimizaka New Year Festival will feature a guest performance by Karan Eri of Appliyama 470! But Copipemon works some mischief to fill the town with Eri videos! Will the concert to celebrate her new CD be canceled?!

Bootmon keeps running away with his emergency evacuation program! The team completes a special program which lets Haru finally make contact... but just then, Yujin starts acting strangely...

Astora is determined to stream a meteor shower live for a special fan in the hospital, but he's ambushed and sent to live at an inescapable temple complex. Time for the team to run a jailbreak!

Just as things seemed to be working out, Yujin revealed his terrible secret: he was a Leviathan-created AI all along! Bootmon is evolved into a more advanced form, and the God-grades are released...

Leviathan initiates Operation: Human Applications, and little by little, the people of the world are converted into apps. Eri, Astora, and Rei apprealize their God Appmon to try to defeat Deusmon!

A massive shadow appears in the skies and throws the city into chaos! Who would have thought Leviathan would apprealize, too? Haru gets the Gaiamon chip, but can he bring back his best friend Yujin?

Eri wants to become one of the selected members of Appliyama 470! To pass the audition, she undergoes strict training under Coachmon's tutelage! But is Coachmon secretly working for Leviathan?!

Hajime, finally himself again, learns of Operation: Human Applications, a plan to turn all of humanity into easily-regulated data. And the key to stopping Leviathan's terrible plan is... Bootmon?!

It's Valentine's Day in the city, but everyone's smartphones are in danger! Updating Waffle OS, the operating system used by 70% of the world's phones, is causing them to freeze up and die...

Let's see who can get Sleepmon to wake up first! The Appmon try all different kinds of tactics, but Sleepmon shows no sign of waking, so...

The team visits the fortune-telling app Appmon, Tellermon, to find the location of the next Seven Code Appmon! But when Tellermon is infected with the L-Virus...

Rei has found a clue about Hajime's whereabouts. Though Eri is thinking of quitting Appliyama because of L-Corp's new CEO, he gets her to agree to let him disguise as her manager to infiltrate the company. But what is his plan?!