Comparison

Dual N vs VR MemoPa

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

Head to head
About

Dual N

This app offers a scientifically proven memory workout by challenging users to remember both the position of a square and a spoken letter. The difficulty increases as users improve, requiring them to recall information from a specified number of turns ago.

Highlights
  • Memory and position recall
  • Progress tracking
  • Adjustable game duration
  • Automatic level adjustment
  • Dark Mode support
  • Export gameplay data
Features
Read full description

Dual N-back. Scientifically proven memory workout! - Every session consists of 40 turns. Each turn a square will light up in a 3x3 grid and a letter will be read out loud. - Your job is to remember both the letter and the position of the square - and then indicate when the current square or letter is the same as it was N turns ago. - As you get better, the number of turns N you have to remember is increased. *** Features *** - Track your progress - Toggle automatic level adjustment - Dark Mode support on iOS 13 - Change game duration and delay between readings - Landscape game play support - Change sounds - Inverse buttons - Exporting your gameplay data - Link your account with email *** Terms of Use *** - https://jensgrud.wixsite.com/nback/terms

About

VR MemoPa

Enhance memory retention by associating images with virtual locations. Create custom memory palaces using simple Excel files to visualize and recall information faster and more effectively.

Highlights
  • Create virtual memory palaces
  • Associate images with locations
  • Utilize Excel for data input
  • Supports VR headset integration
  • Gamepad controller support
  • Visualize and recall information
Features
Read full description

App Overview This app is designed to support memory-technique training. Memory techniques associate information with “places” or “images,” making it easier to organize and recall. In the app, you can practice placing images at specific locations within a virtual space, just as memory athletes do. Enter the keywords you want to memorize and their corresponding images in Google Sheets. You can then display them in the app in the format “Keyword | Image.” Place the images in the virtual environment and view them as you move through the space. This helps you practice associating locations with mental images. The app automatically converts Google Sheets data into Excel format. No manual conversion is required. Regular practice can help you organize and recall information more easily. If you forget something, you can view the placed image again and use it as a memory cue. The app also includes exercises for memorizing the order of a full deck of playing cards and the positions of black and white pieces on an 8×8 board. Reference Videos How to Create Data Using a Smartphone https://youtu.be/BnGdVLgvQhw App Introduction Video https://youtu.be/4vHh9wTzH6c How to Remember Locations with a Memory Palace https://youtu.be/pv0iqQWbdQQ Basic Controls Select “Memory Palace” from the menu to open the virtual space. Use the directional buttons on the left to move forward, backward, right, and left. Use the control area on the right to change the viewing direction. You can select the data you want to use from the menu. To use sample data, select “Choose Data,” followed by “Open Sample.” Several sample sheets are available. How to Create Data Enter data in Google Sheets using the following format: First column: Keyword Example: Meat Second column: Image Example: https://example.com/image.png or gdrive:id Enter the keyword in the first column. In the second column, enter the URL of a JPG or PNG image or the ID of an image stored in Google Drive. To use an image from Google Drive, add gdrive: before the image ID. The registered data can be displayed in the app in the format “Keyword | Image.” One image can be assigned to each keyword. To use multiple images with the same keyword, enter each image on a separate row. Using an Excel File You can also use an Excel file (.xlsx) directly. To save the file on an iPhone, select “Save to Files,” then choose: “On My iPhone” → “VR Memory Palace” You can then select the file in the app using “Select Excel File.” Important Notes Using many large images may consume too much device memory or slow down the display. If this happens, reduce the image sizes before use. The app also supports VR headsets. In VR mode, you can move using a game controller. The “8BitDo Zero 2” game controller has been tested with the app.

Screenshots

Dual N4 screens
VR MemoPa4 screens

Verdict

The call

The clearest difference is in-app purchases: VR MemoPa at none against Dual N's 2. VR MemoPa also leads on update cadence (every 10 days vs every 3 weeks). Dual N's advantage is ads (none vs shown) and ratings volume (1.2K vs 2). On price, rating, 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

Both are free to download. Dual N sells 2 in-app purchases, starting at $0.99 per month. VR MemoPa asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Dual N holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Dual N has 1.2K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Dual N ships an update every 3 weeks, VR MemoPa every 10 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Dual N versus VR MemoPa: the parameters behind the verdict, then further details
ParameterDual NVR MemoPa
PriceFreeFree
Rating4.7 (1.2K ratings) — better4.5 (2 ratings)
Positive reviews55.3% of reviews—
Number of ratings1.2K — better2
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.013.0
Further details — not scored
Size33 MB965 MB
Age rating4+4+
DeveloperJens GrudHajime Hotaka

Customer experience

Dual N

All ratings1,157 ratings
Positive93.2%
Neutral2.3%
Negative4.5%
Written reviews123 reviews
Positive55.3%
Neutral10.6%
Negative34.1%

VR MemoPa

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Dual N

Reported bugs

5 issues
  • Sudden change in sound/language
  • Accidental stop button presses
  • Inconsistent level adjustments
  • Scoring issues (e.g., combining square and sound scores)
  • Compatibility problems on certain devices

Requested features

5 requests
  • Add N=1 level for beginners
  • Improve statistics and progress tracking
  • Allow changing sounds/visuals
  • Extend game duration beyond 60 seconds
  • Provide more detailed instructions

VR MemoPa

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Dual N

Subscriptions2
  • Dual N-Back pro$0.991 Month
  • Dual N-back pro$7.991 Year
None

VR MemoPa

No in-app purchases

Questions

Is Dual N free?
Dual N is free to download, with in-app purchases available.
Is VR MemoPa free?
VR MemoPa is free to download, with no in-app purchases.
Which has better reviews, Dual N or VR MemoPa?
Dual N is rated higher. Dual N averages 4.7 out of 5 from 1.2K ratings, while VR MemoPa averages 4.5 from 2 ratings.
Do Dual N or VR MemoPa have ads?
VR MemoPa shows ads; Dual N does not.
Which is updated more often, Dual N or VR MemoPa?
Dual N ships an update every 3 weeks, and VR MemoPa every 10 days. Most recently, Dual N was updated on October 25, 2026 and VR MemoPa on October 24, 2026.

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