Comparison

Number Memory 25 vs Chart Dojo 100

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Number Memory 25

This brain training app helps improve memory by challenging users to memorize and recall sequences of numbers. Regular, short practice sessions can enhance visual memory and cognitive skills.

Highlights
  • Memorize and recall number sequences
  • Visual memory training
  • Daily 30-second practice
  • Progressive difficulty
  • Simple, challenging gameplay
Features
Read full description

Can't remember your phone number? Can't remember your postal code? If you've had these experiences, you may be experiencing a decline in memory! This is a simple but challenging brain training app for those who want to improve their memory. By repeating it once a day for 30 seconds for a week, you can train your memory. The rules are simple. First, quickly memorize the numbers displayed. Then, recall and input the numbers in order. The numbers are not displayed for a long time. Let's use visual memory to quickly memorize the numbers! So, how many numbers can you remember?

About

Chart Dojo 100

Features
Read full description

A game for practicing trade decisions and money management on real historical charts. No real money is involved. Available in English, Japanese and Simplified Chinese. ■ How to play - The rest of the chart is hidden. Choose buy, sell or pass, set leverage (1x–400x), a stop-loss and a take-profit, then enter. - The actual price action replays one bar at a time. Your position stays open until the stop-loss, take-profit or trailing stop is hit, or until you close it yourself (up to 3 months). - Drag the lines on the chart to set your stop-loss and take-profit, or enter them as an amount, a % of your capital or a % price move. - "Wait and see" lets you advance the chart before entering. - Start with ¥1,000,000. If your capital hits zero, it's game over. ■ Learn from real data - Actual price action from 2012 to 2025: forex (USD/JPY, EUR/JPY, GBP/JPY, AUD/JPY), stock indices (Nikkei 225, S&P 500, Nasdaq 100), gold, Bitcoin and Ethereum. - Choose which instruments you want to be quizzed on. - Every level comes with a short briefing on the economic backdrop of that period, so you can factor in monetary policy and the business cycle. - Take on levels that start right before historic events such as Brexit, Japan's currency interventions, the FTX collapse and tariff shocks. ■ Learn from the result - After each level, the app explains the pattern in that scene: trends, support and resistance, double bottoms, head and shoulders, breakouts, fakeouts and more. - Compare "what the pattern suggested" with "what actually happened". - Review what would have happened if you had held on, and what % of your capital you risked. ■ World ranking - Overall ranking by level reached and capital. - The world's best capital for each level is also published. * This app is a simulation for learning and entertainment. It is not investment advice and does not guarantee future profits. All in-game amounts are in Japanese yen.

Screenshots

Number Memory 254 screens
Chart Dojo 1004 screens

Verdict

The call

The clearest difference is price: Chart Dojo 100 at Free against Number Memory 25's $0.99. Chart Dojo 100 also leads on in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Chart Dojo 100 is free to download; Number Memory 25 costs $0.99 up front. Number Memory 25 sells 1 one-off in-app purchase. Chart Dojo 100 asks for nothing beyond the download.

UpkeepUpdate frequency

Number Memory 25 ships an update every 3 weeks, Chart Dojo 100 fortnightly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 7 level
Number Memory 25 versus Chart Dojo 100: the parameters behind the verdict, then further details
ParameterNumber Memory 25Chart Dojo 100
Price$0.99Free — better
Rating5.0 (5 ratings) — better—
Number of ratings5 — better—
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size3 MB11 MB
Age rating4+4+
DeveloperT&T United Inc.takuya yukimoto

In-app purchases

1 purchases

Number Memory 25

One-time1
  • Unlock AllFree
None

Chart Dojo 100

No in-app purchases

Questions

Is Number Memory 25 free?
Number Memory 25 costs $0.99, and also offers in-app purchases.
Is Chart Dojo 100 free?
Chart Dojo 100 is free to download, with no in-app purchases.
Do Number Memory 25 or Chart Dojo 100 have ads?
Neither Number Memory 25 nor Chart Dojo 100 shows ads.
Which is updated more often, Number Memory 25 or Chart Dojo 100?
Number Memory 25 ships an update every 3 weeks, and Chart Dojo 100 fortnightly. Most recently, Number Memory 25 was updated on October 24, 2026 and Chart Dojo 100 on October 29, 2026.

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