Comparison

Navidys vs Major System Trainer

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

Head to head
About

Navidys

This Safari extension helps users read web content more comfortably by offering extensive customization options for fonts, spacing, and colors. It includes specialized fonts like Dyslexie to reduce visual stress and improve comprehension.

Highlights
  • Customizable web page styling
  • Multiple font choices including Dyslexie
  • Adjustable font size and letter spacing
  • Line spacing control
  • Web page zoom functionality
  • Text and background color selection
  • System font installation for other apps
Features
Read full description

Make the web more comfortable to read. Navidys is a Safari extension that reformats web pages to your reading preferences: spacing, font, size, zoom and colors — adjustable site by site. WHY SPACING MATTERS In a controlled study published in PNAS (Zorzi et al., 2012), increasing the space between letters immediately improved reading accuracy in children with dyslexia. Navidys gives you precise control over letter spacing and line spacing on every web page. FEATURES - Apply your style to web pages individually - Adjust the spacing between letters and between lines - Change the font — 16 choices including Dyslexie (created by Christian Boer for dyslexic readers; font choice is a matter of personal comfort), Helvetica, Andika Basic, Luciole, AccessibleDfA, Sylexiad, Verdana and more - Adjust font size and zoom on any page - Choose text and background colors for better contrast and visual comfort - Install the typefaces on your device to use them in other compatible apps Navidys is an accessibility and comfort tool. It does not diagnose or treat dyslexia. Your suggestions are welcome!

About

Major System Trainer

Features
Read full description

Turn every number into a picture your brain can't forget. Major System Trainer teaches you the Major System — the classic memory technique that turns digits into sounds, sounds into words, and words into vivid mental pictures. Once every number from 00 to 99 has its own image, memorizing phone numbers, PINs, dates, playing cards, or long strings of digits stops being a chore and starts being a game. HOW IT WORKS Each digit (0-9) maps to a consonant sound. Pairs of digits become words, and words become pictures you actually remember — because a picture beats a string of digits every time. The app walks you through the digit-to-sound rules first, then gives you a complete, ready-to-use set of 100 peg words and images for every number 00-99. TWO WORD SETS TO START Pick whichever clicks with you: a Classic English word set with clean, simple pegs, or a personal photo set using real photos for every number. Switch anytime from the menu, and any word or picture you customize yourself stays exactly as you left it either way. MAKE IT YOURS Don't like a word or picture for a particular number? Change it. Every entry in the 00-99 list can be edited with your own word and your own photo, so the system fits how your memory actually works. TRAIN AT YOUR OWN PACE Flashcard-style drills quiz you both directions — number to picture, and picture back to number — so the association gets locked in from both sides. PUSH YOURSELF WITH CHALLENGES Growing Number: memorize a number that gets one digit longer every round. Timed Run: answer as many flashcards as you can in 60 seconds. Sequence Recall: watch a series of pictures, then reproduce the exact order. Memory House: a fully illustrated house with fifteen rooms, each holding a number — place them all correctly to win, in a visual spin on the classic memory palace technique. TRACK YOUR PROGRESS Every challenge mode keeps a highscore, so you can watch your recall speed and memory span improve over time. Whether you're a student, a competitive memory athlete, or just someone tired of forgetting phone numbers, Major System Trainer gives you a complete, structured way to build a genuinely better memory — one number at a time.

Screenshots

Navidys4 screens
Major System Trainer4 screens

Verdict

The call

The clearest difference is price: Major System Trainer at $1.99 against Navidys's $7.99. Navidys's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 15.1). On update cadence, 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

Navidys costs $7.99 and Major System Trainer $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Navidys ships an update fortnightly, Major System Trainer every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Navidys versus Major System Trainer: the parameters behind the verdict, then further details
ParameterNavidysMajor System Trainer
Price$7.99$1.99 — better
Rating4.4 (27 ratings) — better—
Positive reviews44.4% of reviews—
Number of ratings27 — better—
Update frequencyFortnightly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size9 MB31 MB
Age rating4+4+
Developermichael dardolJerome Agostini

In-app purchases

None

Navidys

No in-app purchases

None

Major System Trainer

No in-app purchases

Questions

Is Navidys free?
Navidys costs $7.99, with no in-app purchases.
Is Major System Trainer free?
Major System Trainer costs $1.99, with no in-app purchases.
Do Navidys or Major System Trainer have ads?
Neither Navidys nor Major System Trainer shows ads.
Which is updated more often, Navidys or Major System Trainer?
Navidys ships an update fortnightly, and Major System Trainer every 2 weeks. Most recently, Navidys was updated on November 3, 2026 and Major System Trainer on October 31, 2026.

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