Mahjong game for iPhone
Mahjongji
Mahjong done properly: learn it, play it, find people to play it with.
What it is
Mahjongji is a full mahjong game: sit at a table against coached opponents, learn the rules step by step and find real players near you.
- Four rule sets: Hong Kong, Japanese Riichi, Chinese Official (MCR), Taiwanese 16-tile
- Short coached lessons from your first tile
- Real calls and proper scoring
- Find or host a local table
Who it is for
Beginners who want to learn mahjong, and experienced players who want a proper table.
How it earns
Free to download. Membership with a 1-week free trial, monthly or annual, per the App Store listing.
Category
Mahjong game for iPhone
The thesis
Why this category, and why we are not first
Mahjong is already a proven mobile category: Mahjong Soul passed $100M lifetime revenue in Japan alone, and Vita Mahjong reached #1 on the US App Store in 2025. Most mobile titles are tile-matching solitaire. Real four-player mahjong with teaching and a local-players layer is the underserved lane, and the one we are building for.
Market size
What third-party analysts estimate
Online mahjong platforms (Dataintelo)
Publisher-stated CAGR: 9.5%. Source: Dataintelo
US mobile tabletop game spend (2021)
Publisher-stated CAGR: +40% that year. Source: Sensor Tower (Aug 2021)
These are published estimates from market-research firms and trackers. They are not SundayTech forecasts and publishers often disagree; where they do, both are shown.
The tabletop spend figure is from 2021 and is the most recent public Sensor Tower figure we found for that category. We have not found a current public sizing for mobile mahjong.
Competitors
Who is in the space and what they earn
| Company | What it is | Scale (as published) | Source |
|---|---|---|---|
| Mahjong Soul (Yostar) | Online four-player mahjong, anime style | $100M+ lifetime in Japan (Sensor Tower, 2022) | Sensor Tower via Tencent News (Dec 2022) |
| Vita Mahjong | Tile-matching mahjong solitaire | #1 US App Store, 1M+ downloads (2025) | FoxData (Sep 2025) |
| Mahjong Club | Tile-matching mahjong solitaire | 48.5M installs, $100K+ monthly revenue estimate | AppGoblin estimate |
Figures marked estimate come from third-party app trackers and are approximate. "No verified figure" means we looked and found no reliable public number, so we show none.
Where in the world
Where the downloads are
We aim to launch worldwide. Download volume is the best country-level data that is public across every category, so here are the ten biggest app markets and how each moved last year.
Source: AppTweak, App downloads by country (Dec 2025). Both stores, Nov 2024 to Nov 2025, all app categories.
For Mahjongji
Existing demand we found evidence of is in Japan (Mahjong Soul, and a 2026 Mainichi report of a resurgence across ages) and the US (Vita Mahjong). Mahjong is resurging in Japan across all ages (Mainichi, Mar 2026). Four rule sets let one app serve different regional styles of play.
The $100 million ambition
What a $100 million a year Mahjongji would take
A scenario, not a forecast and not expected revenue. $100 million a year in revenue in three years is the ambition we are building toward. This is the arithmetic of it: how many paying subscribers that takes at three illustrative prices. Mahjongji has no such traction today and nothing here is a promise.
Illustrative price points chosen for the maths. They are not Mahjongji's pricing. The numbers here are a scenario, not results.
Sources
- Dataintelo
- Sensor Tower (Aug 2021)
- Sensor Tower via Tencent News (Dec 2022)
- FoxData (Sep 2025)
- AppGoblin estimate
- AppTweak, App downloads by country (Dec 2025)
- Mainichi (Mar 2026)
Checked October 2026. Market-research publishers often disagree with each other, so where two estimates exist we show both.