Comparison

Mnemonizer vs ScrollKiller

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

ScrollKiller

This app offers a revolutionary approach to combat compulsive social media use by detecting mindless scrolling and temporarily blocking access. It helps users regain focus on real-life goals and provides a "Hard Mode" for increased resistance to temptation. Users can also set intentions to be reminded of what truly matters.

Highlights
  • Detects mindless scrolling
  • Temporarily blocks social media
  • Hard Mode for stronger barrier
  • Set intentions for focus
  • Helps regain control over time
  • Promotes healthy rest and meaningful activities
Features
Read full description

It’s simple, and you probably already know. Social media are built to get you to check them often, and then turn this "quick check" into hours. Weak screen time reminders do not work much. ScrollKiller is something completely different. It’s a new revolutionary tool that helps you kill the compulsive use of social media. Simply, it helps you take back control. How it does that: - it temporarily blocks social media when it detects mindless scrolling - helps you focus on the real life and real goals - protects you in the moments of weakness - when your willpower fails, it will usually mean this: 1. you scroll for a few minutes 2. you get blocked 3. you are now slightly annoyed at our app 4. then you close social media instead of wasting your time Hard Mode adds a stronger barrier. Every time you want to open social media, you have to wait and think about your decision first. Most of the time, people realize they don’t actually need to use the social media app and close it immediately. Now they can actually rest in a healthy way, or do anything meaningful. You can add intentions: the important things you actually want to do or focus on. ScrollKiller shows them to you every time you try to waste time on social media. You already know scrolling less would be better. The hard part is actually doing it. ScrollKiller will still need you to cooperate, but it’s extremely powerful. Stop feeding the addiction. Kill it by making the right choice, even when it doesn’t feel easy. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Mnemonizer4 screens
ScrollKiller4 screens

Verdict

The call

The clearest difference is rating: Mnemonizer at 4.8 against ScrollKiller's 3.0. Mnemonizer also leads on in-app purchases (none vs 3) and ads (none vs shown). ScrollKiller's advantage is update cadence (every 6 days vs every 14 months). On price and ratings volume 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. ScrollKiller sells 3 in-app purchases, starting at $1.90 per month. Mnemonizer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Mnemonizer holds the better App Store score, 4.8 against 3.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 83% of Mnemonizer's written reviews are positive against 50% of ScrollKiller's.

UpkeepUpdate frequency

Mnemonizer ships an update every 14 months, ScrollKiller every 6 days. The most recent releases landed on September 23, 2026 and September 20, 2026 respectively.

Scorecard8 real differences · 2 level
Mnemonizer versus ScrollKiller: the parameters behind the verdict, then further details
ParameterMnemonizerScrollKiller
PriceFreeFree
Rating4.8 (4 ratings) — better3.0 (2 ratings)
Positive reviews83.3% of reviews — better50.0% of reviews
Number of ratings4 — better2
Update frequencyEvery 14 monthsEvery 6 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS8.0 — better18.0
Further details — not scored
Size18 MB18 MB
Age rating4+4+
DeveloperHappymagenta UABSamuel Kulik

Customer experience

Mnemonizer

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

ScrollKiller

Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Mnemonizer

No in-app purchases

3 purchases

ScrollKiller

Subscriptions2
  • Pro Monthly2 Months trial$1.901 Month
  • Pro Yearly14 Days trial$10.001 Year
One-time1
  • Pro Lifetime$40.00

Questions

Is Mnemonizer free?
Mnemonizer is free to download, with no in-app purchases.
Is ScrollKiller free?
ScrollKiller is free to download, with in-app purchases available.
Which has better reviews, Mnemonizer or ScrollKiller?
Mnemonizer is rated higher. Mnemonizer averages 4.8 out of 5 from 4 ratings, while ScrollKiller averages 3.0 from 2 ratings.
Do Mnemonizer or ScrollKiller have ads?
ScrollKiller shows ads; Mnemonizer does not.
Which is updated more often, Mnemonizer or ScrollKiller?
Mnemonizer ships an update every 14 months, and ScrollKiller every 6 days. Most recently, Mnemonizer was updated on September 23, 2026 and ScrollKiller on September 20, 2026.

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