Second phone number apps in Japan
Japan — Utilities, for consumers. Niche: Second Phone Number.
Data from the week of 19 Oct 2026, refreshed every two weeks.
Our call
We have not checked this against App Store search in Japan yet, so we won’t call it. Checks run every day, highest-scoring openings first.
At a glance
- Demand
- Medium, neither for nor against you
- 177,703 ratings
- Revenue
- Low, against you
- 1 top-grossing
- Competition
- Low, in your favour
- 0 established in Japan
- Leading apps
- Weak, in your favour
- 3.1★ average
How the score of 57 is made
score out of 100
- Demand66
177,655 ratings in the US and UK, 48 in Japan
- Revenue26
1 of the top 2 on a top-grossing chart in the last 30 days; 0 paid
- Room locally100
0 established apps in Japan (75+ ratings, scaled to the market’s size)
- Language gap50
Not checked in local search yet — counted as neutral (50) at most
- Incumbent weakness50
3.1 stars on average; 0 of 2 not updated in a year
- AI gap30
2 of the top 2 not built around AI
- Momentum—
History building since 19 Oct 2026 — counted as neutral (50) for now
Why this is an opening
Demand sits at 66 with local apps collecting only 48 ratings for the top app. The weighted rating in Japan is 3.1. 2 top apps are non-native.
What people in Japan see
Not yet checked against local App Store search. Checks run every day, highest-scoring openings first.
How strong the competition is
The leading apps in this niche
The niche’s apps available in Japan, ranked by their share of ratings here and in the United States and United Kingdom; stars in Japan where it has them.
| App | Ratings in Japan | Ratings US + UK | Stars | Japanese | Last update | AI |
|---|---|---|---|---|---|---|
| Phoner: Second Phone Number | 48 | 35,929 | 3.1 | No | Sept 2026 | No AI |
| Second Phone Number - 2NumberNot in this store | 0 | 141,726 | 4.5 | Yes | Oct 2026 | AI feature |
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Is demand growing
New ratings each week in Japan, added up over the leading apps. A rating count only grows, so a week’s rise is the people who rated that week.
- Last 4 weeks
- 4 weeks before
- Earlier
Members see the weekly trend.
Show as a table
| Week | New ratings |
|---|---|
| Members | — |
How the leading apps make money
2 of 2 leading apps sell in-app purchases, priced ¥500 to ¥3,000. Prices as the App Store lists them in this market; most bought first.
See what each leading app sells and at what price.Get 30 days — €19 →
What users complain about
Too few low-star reviews to group into complaints yet.
If you build it
The smallest app that answers what users complain about and what the leaders leave out. Each feature says where it comes from.
- What apps here chargethe leading apps' in-app prices, once we have read themMembers
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What would kill this
Up to three things that would end this opening, each tied to the data.Get 30 days — €19 →
The same niche in other markets
- This market
- Other markets
✓ checked against local App Store search. Other markets are named for members.
Show as a table
| Market | Score | Checked against local search |
|---|---|---|
| Members | 57 | Not yet |
| Japan | 57 | Not yet |
| Members | 57 | Not yet |
| Members | 56 | Not yet |
| Members | 56 | Not yet |
| Members | 56 | Not yet |
| Members | 55 | Not yet |
| Members | 55 | Not yet |
| Members | 53 | Not yet |
| Members | 53 | Not yet |
| Members | 52 | Not yet |
| Members | 52 | Not yet |
| Members | 52 | Not yet |
| Members | 51 | Not yet |
| Members | 51 | Not yet |
| Members | 51 | Not yet |
| Members | 51 | Not yet |
| Members | 51 | Not yet |
| Members | 51 | Not yet |
| Members | 50 | Not yet |
| Members | 49 | Not yet |
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Scored 2026-10-26 with score version 4. How the score works. Store data only: we do not estimate revenue or downloads.