Comparison

Mnemonizer vs Columns.app

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

Head to head
About

Mnemonizer

This app offers a unique method to secure sensitive information like PINs and passwords by disguising them within a visually camouflaged grid of random characters. It allows users to create mnemonic cards, mentally mapping data positions for uncrackable privacy.

Highlights
  • Hide PINs and passwords
  • Mnemonic card system
  • Camouflaged data display
  • Automatic iCloud sync
  • Multiple data cards
  • Uncrackable security
Features
Read full description

Mnemonizer hides your PIN codes and passwords in a camouflaging environment, making them uncrackable for frauds and undetectable for spying eyes. ○○○ “Mnemonizer provides a novel security approach, enabling you to obscure your codes in plain text.” – TUAW ○○○ HOW IT WORKS The system generates a mnemonic card with a cell field. Each cell starts with a random editable value - number/letter/symbol and color. All you need to do is choose a place, where you’d like to hide your data and edit the corresponding cells. Place your data on the field in any convenient way (in a simple line, in a zigzag or even as a skip pattern). Then mentally mark its position, give a name to the card and your stored information is ready to use. On second opening, your brain instantly recognizes the position of the data, while everyone else sees a mess. In a variety of up to 9,223,372,036,854,775,807 (2^63) of possible arrangement combinations, guessing or cracking gets impossible. Thus, yours will stay only yours. FEATURES - your data stays safe at all times, even if someone sees your screen - hide passwords and PIN codes among random symbols on mnemonic cards - store all data on one card or create separate cards for different data - nothing to intercept or spy, thus nearly impossible to crack - automatic iCloud sync and backup ○○○ More from Happymagenta: · Spyglass - outdoor GPS with augmented reality · Scany - WiFi scanner and network utility

About

Columns.app

Organize your thoughts and tasks with a unique column-based list manager. Ideal for planning, tracking, and managing projects, ideas, or collections. It offers a structured, linear approach similar to mind maps for clear visualization.

Highlights
  • Organize with linear columns
  • Plan and track progress
  • Manage projects and ideas
  • Create roadmaps
  • Teamwork organization
Features
Read full description

Columns is a list manager. Lists are great for organizing things and see the big picture. It's perfect for planning, tracking, noting, managing and thinking. It is like mind maps but organized in a linear, columns structure. What for? Make a list of movies you want to see. Put all your recipes together. Create a roadmap for your project. Organize teamwork. Lists help track progress. Write a novel. So it’s a tool for organizing lists, and lists are a tool for organizing things. If you need the ultimate organizer, you found it.

Screenshots

Mnemonizer4 screens
Columns.app4 screens

Verdict

The call

The clearest difference is review sentiment: Mnemonizer at 83% against Columns.app's 50%. Mnemonizer also leads on rating (4.8 vs 4.3) and device support (4 vs 2). Columns.app's advantage is update cadence (every 3 weeks vs every 14 months). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Mnemonizer holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews point the same way: 83% of Mnemonizer's written reviews are positive against 50% of Columns.app's.

UpkeepUpdate frequency

Mnemonizer ships an update every 14 months, Columns.app every 3 weeks. The most recent releases landed on November 13, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Mnemonizer versus Columns.app: the parameters behind the verdict, then further details
ParameterMnemonizerColumns.app
PriceFreeFree
Rating4.8 (4 ratings) — better4.3 (3 ratings)
Positive reviews83.3% of reviews — better50.0% of reviews
Number of ratings4 — better3
Update frequencyEvery 14 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS8.0 — better17.0
Further details — not scored
Size18 MB19 MB
Age rating4+4+
DeveloperHappymagenta UABColumns, inc.

Customer experience

Mnemonizer

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews12 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Columns.app

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews4 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

In-app purchases

None

Mnemonizer

No in-app purchases

None

Columns.app

No in-app purchases

Questions

Is Mnemonizer free?
Mnemonizer is free to download, with no in-app purchases.
Is Columns.app free?
Columns.app is free to download, with no in-app purchases.
Which has better reviews, Mnemonizer or Columns.app?
Mnemonizer is rated higher. Mnemonizer averages 4.8 out of 5 from 4 ratings, while Columns.app averages 4.3 from 3 ratings.
Do Mnemonizer or Columns.app have ads?
Neither Mnemonizer nor Columns.app shows ads.
Which is updated more often, Mnemonizer or Columns.app?
Mnemonizer ships an update every 14 months, and Columns.app every 3 weeks. Most recently, Mnemonizer was updated on November 13, 2026 and Columns.app on November 3, 2026.

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