Bisa 微差 — いつもと違う、を残す。

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About this app

Take one photo.

That's all.

Bisa (微差) is a record-keeping app that simply records one photo per day.

You can add a short message or not.

There's no sharing on social media. Don't show it to anyone.

Just keep one photo for yourself.

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■ No praise. No encouragement. No advice.

Bisa looks at the photo and writes only two lines.

"Today" and "Center of Gravity."

Today: A heading describing what happened that day.

Center of Gravity: Where your eyes were directed.

It doesn't say anything more.

It doesn't encourage growth. It doesn't force reflection.

It doesn't even say, "That's a nice photo."

--

■ Patterns become visible in 7 days.

Once you've accumulated a week's worth of records, a summary arrives.

What you were looking at.

Where your eyes were directed.

Just that, quietly.

And then, one question arrives.

A question you don't need to answer.

But a question that lingers, just a little.

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■ In 30 days, time becomes visible.

The days you thought were "the same every day"

When you open the calendar, they're all different.

As a month's worth of records accumulate,

Your own "pattern" begins to emerge.

What do you tend to focus on?

In what situations do you pause?

This isn't something someone teaches you;

It naturally emerges from your records.

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■ What this app *doesn't* do

・Social features (follow, like, share)

・Self-improvement suggestions and coaching

・Badges and streak displays for consecutive records

・Advertisements

Quietness is the function of this app.


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■ For those who:

・Are tired of social media

・Want to keep a diary but find writing troublesome

・Take photos but don't have the habit of looking back at them

・Are a little afraid of "the same thing every day"

・Want to confirm that their own time was indeed flowing

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■ How to use

1. Select one photo

2. Add a short caption (optional)

3. That's it

The photo will be recorded, and a two-line record will be sent.

A summary and question will be sent every 7 days.

In 30 days, you will be able to see your time.

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Quietly record the changes that are actually happening within time that seems to stand still.

Bisa: Subtle Differences.

Preserve what's different from usual.
Updated on
May 9, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Photos and videos and 3 others
Data is encrypted in transit
You can request that data be deleted
Content rating
Everyone
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App support

About the developer
星野将
masartz@gmail.com
大宮区土手町3丁目57−4 さいたま市, 埼玉県 330-0801 Japan