Comparison

Simplex Spelling HD vs Number Blast

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

Head to head
About

Simplex Spelling HD

This app enhances English spelling and reading skills using a unique "reverse phonics" approach and contextually relevant spelling rules. It acts as a personal spelling coach, teaching foundational Dolch sight words through interactive word building and immediate feedback.

Highlights
  • Teaches Dolch Sight words
  • Reverse phonics approach
  • Contextual spelling rules
  • Interactive word building
  • Phonics hint feature
  • Letter-by-letter feedback
  • Multiple user accounts
Features
Currently charting
Read full description

Simplex Spelling improves English spelling and reading skills in a fun and interactive way by combining a unique “reverse phonics” approach with contextually relevant spelling rules that explain why words are spelled in a particular manner. It works like a personal spelling coach with every word. Simplex Spelling HD teaches the Dolch sight words to establish a base foundation in spelling and reading fluency. Please check out the word lists on our website before purchasing to ensure they meet your learning requirements https://pyxwise.com/sight-words-description/#Word-Lists Rather than using flash cards, Simplex Spelling enables the student to build each word. Students gain skills above and beyond the sheer memorization of words. Simplex Spelling is great tool to have for kids learning to spell and read, remedial students, or those learning English as a second language. Recommended for ages 5+. Note: You can not create your own spelling lists in Simplex Spelling HD. Features: - All of the more than 300 Dolch Sight words to help build literacy. - Words are spoken and used in a sentence to establish context. - Introduction seamlessly leads a student through the application’s features by providing spoken information while having the student spell new words. - Powerful phonics hint feature sounds out each word and provides a list of possible phonograms for each sound. - A full “reverse phonics” approach that includes sounds made by all the different letter combinations. - Contextually relevant spelling rule hints that help explain “how to spell” English words. - Unique letter by letter feedback system that provides immediate feedback. - Guaranteed success on every word. - Support for multiple user accounts. - User stats screen that allows you to see words that have been mastered and words that require further practice. - Export & email student progress reports. - Remembers each user’s position and progress. - Supports both upper and lower case letters. - Supports both alphabetic and QWERTY keyboard layouts. - Supports US, UK and Canadian English spelling. - An approach that appeals to audio, visual and tactile learners. Privacy Disclosure: - No 3rd party ads - Does not share any data - No In-App purchases - Contains child protected links in app to developer's website for additional information, support and teaching tips. - Contains child protected link to developer email support. COPPA Compliant 
https://pyxwise.com/privacy-policy/

About

Number Blast

This educational game helps children aged 5-7 develop memory, attention, and number recognition skills through engaging number sequence challenges. It features adjustable difficulty, a two-player mode, and progress tracking to foster cognitive abilities for school and life.

Highlights
  • Memory and attention training
  • Number sequence exercises
  • Adjustable difficulty levels
  • Two-player mode
  • Progress tracking and scoring
  • Kid-safe, no ads or tracking
Features
Read full description

Features of Number Blast! • Three educational games that help students (ages 5-7) exercise their memory • Players must find sequences of numbers in forward and reverse order • Helps train attention, memory and focus • Difficulty level is automatically adjusted • Two-Player Option is available • Scores are automatically saved to show progress and can be used to identify a child's success. • Scores can also be emailed to keep a record of a child's progress. • Colorful graphics and lively music make this game fun to play • Kid-safe: No third party ads or tracking This game helps young children develop their memory and attention skills while providing practice recognizing numbers. Children, ages 5 to 7, will have fun playing and learning in settings ranging from card games to a night sky of fireworks. All of BrainTrain games are specially created to help children practice the cognitive abilities important in school and life. The games automatically adjust to allow children to learn at a level of difficulty personalized for them. As they succeed, new challenges at harder levels will be presented. Children will be challenged to develop their thinking speed as they are required to respond faster and faster in order to win. While a child's difficulty level is automatically adjusted based on his or her performance, it can be easily modified by parents or teachers when necessary. Distraction stimuli can also be added to reinforce increased focus and the ability to stay on task. In addition, a two player option is available which helps children learn how to take turns and be both a good winner and a good loser. This memory training game for numbers becomes more challenging as players succeed and improve their memory. Each game level must be completed for grades to be saved in single player mode. Please note that no grades are saved in two player mode. Two player mode only records which Player (1 or 2) won the match after three rounds are completed. A training session is completed only when the program is stopped and then removed from memory. If the program is left open in the background and it is selected, then the last session started will be continued. The app will start off with a 60 minute trial version. You can modify the options and run the games during this trial period. Once the trial has ended, you will need to make a one-time in-app purchase to unlock the games for unlimited use.

Screenshots

Simplex Spelling HD4 screens
Number Blast4 screens

Verdict

The call

The clearest difference is review sentiment: Simplex Spelling HD at 90% against Number Blast's 0%. Simplex Spelling HD also leads on in-app purchases (none vs 1) and update cadence (every 3 months vs every 39 months). Number Blast's advantage is price (Free vs $4.99) and iOS requirement (13.0 vs 15.0). On ads and device support 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

Number Blast is free to download; Simplex Spelling HD costs $4.99 up front. Number Blast sells 1 one-off in-app purchase. Simplex Spelling HD asks for nothing beyond the download.

UpkeepUpdate frequency

Simplex Spelling HD ships an update every 3 months, Number Blast every 39 months. The most recent releases landed on October 22, 2026 and October 8, 2026 respectively.

Scorecard7 real differences · 4 level
Simplex Spelling HD versus Number Blast: the parameters behind the verdict, then further details
ParameterSimplex Spelling HDNumber Blast
Price$4.99Free — better
Rating3.2 (5 ratings) — better—
Positive reviews90.0% of reviews — better0.0% of reviews
Number of ratings5 — better—
Update frequencyEvery 3 months — betterEvery 39 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#166 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size134 MB30 MB
Age rating4+4+
DeveloperPyxwise Software Inc.BrainTrain Inc.

Customer experience

Simplex Spelling HD

All ratings5 ratings
Positive40.0%
Neutral40.0%
Negative20.0%
Written reviews30 reviews
Positive90.0%
Neutral3.3%
Negative6.7%

Number Blast

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Simplex Spelling HD

No in-app purchases

1 purchases

Number Blast

One-time1
  • Full Version$2.99

Questions

Is Simplex Spelling HD free?
Simplex Spelling HD costs $4.99, with no in-app purchases.
Is Number Blast free?
Number Blast is free to download, with in-app purchases available.
Do Simplex Spelling HD or Number Blast have ads?
Neither Simplex Spelling HD nor Number Blast shows ads.
Which is updated more often, Simplex Spelling HD or Number Blast?
Simplex Spelling HD ships an update every 3 months, and Number Blast every 39 months. Most recently, Simplex Spelling HD was updated on October 22, 2026 and Number Blast on October 8, 2026.

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