AppBrain's verdict
- Last updated
- November 8, 2026
- Size
- 6.91 MB
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Store listing
By JINGZHE JIANG, from the App StoreDescription by JINGZHE JIANG Written by the developer, not by AppBrain. Click to read.
A 10-DAY LEARNING PLAN
Learn 190 fact pairs, organized by calculation method across 10 lessons. Swapping the factors covers all 361 ordered combinations. Explore doubling, breaking numbers into tens and ones, and working back from 20.
ASSESSMENT AND REVIEW
Start with an optional 20-question assessment. Spaced review uses your answers to bring back facts that need practice, with mistakes and due facts taking priority.
FORWARD AND REVERSE PRACTICE
Find the product: 12 × 13 = □
Find the factors: 156 = □ × □
Choose either mode or mix them. Factors range from 1 to 19. Both factor orders are included, and reverse questions accept any valid factor pair within that range.
YOUR PACE, YOUR TIMER
The default is 5 seconds per question. Choose 3, 5, 6, or 10 seconds, or set a limit from 1 to 30 seconds. Practice 20, 50, 100 questions, or the full question bank. Correct answers receive brief feedback before the next question appears automatically.
PERSONAL RESULTS
Track scores, accuracy, answer time, and individual responses. Compare completed sessions with matching settings on a leaderboard stored on your device.
FREE AND PRO
Download for free. The free tier includes course days 1–5, a 20-question assessment, the complete multiplication table, daily review, basic progress stats, and 20 forward questions per day. A one-time Pro purchase unlocks days 6–10 and every feature from the original full paid app: forward, reverse, and mixed drills; custom factor ranges, question counts, and timers; full training history and leaderboard; the review notebook; and repeat course rounds.
OFFLINE AND SIMPLE
Free to download, with no ads or subscriptions. Made for iPhone and iPad running iOS 18 or later. Available in 13 interface languages.
Progress and results are stored on your device. In-app cloud sync is not available, and deleting the app may erase your records.
The 10-day plan is a course structure, not a guarantee of mastery. Continue practicing and reviewing at your own pace.
Safety and technology
Found in the app by AppBrain- Price
- Free
- App size
- 6.91 MB
- Content rating
- Low
Technologies used by 19×19
Releases
Updates seen on the App Store- Version
- 1.4
- Launched
- September 2026
No changelog data
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Rankings
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About the app and developer
About 19×19
19×19 is an education app developed by JINGZHE JIANG.
User Ratings
The app has no ratings yet.
App Information
19×19 is freely available from the App Store. The app size is 6.91 MB. The latest version available is 1.4. The last update was on November 8, 2026.
Technical Requirements
The app has a content rating of Low Maturity. The app has been available on the App Store since September 2026.
19×19 is made and published by JINGZHE JIANG. AppBrain is an independent app data site and isn't affiliated with JINGZHE JIANG. The app name, icon, screenshots and description belong to JINGZHE JIANG and are shown as published on the App Store.
Developer information for JINGZHE JIANG
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Frequently asked questions about 19×19
Is 19×19 free?
Yes. 19×19 is free on the App Store.
Is 19×19 still available?
Yes. 19×19 is on the App Store, and the last update we saw was on November 8, 2026.
How large is 19×19?
19×19 is 6.91 MB.
Is 19×19 suitable for children?
App Store gives 19×19 a low maturity rating, so it is meant for older children and up.
Who made 19×19?
19×19 was developed by JINGZHE JIANG. It is listed in the education category on the App Store.
What are the best alternatives to 19×19?
People looking at 19×19 also look at these education apps: Table of Squares: Math Trainer, MathSprint - Mental Math Kids, Quick Math Jam, Double Digits: Mental Math, SuperfastMath 2.
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