Simply put this campaign for 'A Ceaseless Flow of Daimoku' could be achieved if one person chanted Daimoku continuously for 24 hrs, 7 days a week, that would be a single thread of Daimoku.
It is the act of chanting Nam Myōhō Renge Kyō (南無妙法蓮華経) with out the worry of pausing for breath, less of a problem when chanting together in a Tozo.

An alternative is, that we all chant in different timezones, morning and evening, so it is likely that before one person stops another has started. For example someone in Paris chanting for an hour would hand over to someone London, but who would someone in London hand over to - Someone starting a bit later in Greenland or Argentina and so on as the the sun moves across the sky . But what if there was a time gap, even though we use UTC what if you clock in Los Angeles said 08:00:00 but in Tokyo it said 00:00:09 ! Even if you both started on on time, even given the lag on the phone line the there would be a 9second gap in the daimoku hand over, the flow would be broken. This is why this app is as real time as possible, it even understands if you are using 3G or 5G.
So if you now imagine this as a wave that might flow around the world, it has height and width as any Surfer would know. Next time you look out at the ocean you will the the frequency of the waves (the 7th is often the biggest), but there is also the strength or surge behind that wave.

Many in Body and One in Mind

So 'Many in Body and One in Mind' can also be placed in many separate people all over the world, come together, adding their strength behind that wave. In terms of Electronic or Physics this would be Power=Volts x Current, where volts are lots of people, and the current the passion behind their diamoku. Therefore, imagine the power of this will for all of humanity to awaken its inherent buddhahood to bring a creative and peaceful society for all.

Why A Ceremony in the Air

One of the three assemblies described in the Lotus Sutra, in which the entire gathering is suspended in space above the sahā world. It extends from the “Treasure Tower” (eleventh) chapter to the “Entrustment” (twenty-second) chapter. The heart of this ceremony is the revelation of the Buddha’s original enlightenment in the remote past and the transfer of the essence of the sutra to the Bodhisattvas of the Earth. More Info

Hosshaku Kempon

Hos-shaku-kempon means "Casting off the transient and revealing the true" The revealing of a Buddha's true status as a Buddha, and the setting aside of that Buddha's provisional or transient identity. This concept has also been applied to Nichiren (1222-1282), who wrote in The Opening of the Eyes:
"On the twelfth day of the ninth month of last year [1271], between the hours of the rat and the ox [11:00 P.M. to 3:00 P.M.], this person named Nichiren was beheaded. It is his soul that has come to this island of Sado and, in the second month of the following year, snowbound, is writing this to send to his close disciples" (269). Nichikan (1665-1726), the twenty-sixth chief priest of Taiseki-ji temple, who was known for his commentaries on Nichiren's writings, interpreted this passage on two levels: First, the phrase "this person named Nichiren was beheaded" corresponds to the passage from the Lotus Sutra that reads, "[Ignorant people] will attack us with swords and staves"; and "his soul that has come to this island of Sado" corresponds to the Lotus Sutra passage "again and again we will be banished."

It maybe hard to believe in our buddhahood and our unlimited potential, there are many negative forces (sanshoshima) that are equal and opposite to our buddhanature, all very ying & yang, but just as there is Fundamental Darkness there must be Fundamental Light.
The whole point of this project, big determination, is Actual Proof of the Practice, that given that we are a buddha, and of Oneness of Self and Environment, that Daimoku works, that if enough people are Many in Body but One in Mind, and that one mind is for Kosen Rufu, then surely we cannot fail. In line with this, we have been encouraged to set big determinations for each 18th of November.
This wonderful app has been produced to drive our determinations and how we will struggle in faith.