Comparison

Simplex Spelling HD vs Dalza

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

Dalza

Features
Read full description

Dalza empowers parents, teachers and healthcare professionals to effectively support neurodivergent children. Dalza is a secure space that integrates information, communication, and collaboration to support the neurodivergent child and their family through every stage of their developmental journey. Dalza's holistic child view captures the child's unique personality, interests, strengths, challenges, and development. Information about milestones, life events, diagnoses, assessments, therapy, education, and support further builds the child profile as a cohesive, living framework through each developmental stage. Contributions by parents, teachers, therapists, and specialists champion the child's developmental path, as ongoing feedback, communication and interactions converge to craft synchronised child-centric support. As the child grows, changes classes, schools, therapists, providers, or even relocates globally, Dalza enables seamless transitions, ensuring consistent, uninterrupted support. Parents and team members can rest assured of the implementation of rigorous security measures and privacy by default and design. Parents are able to set and control permissions of each team member for each element of functionality and items of information. We also make the following Health Declaration setting out services available through Dalza:. Activity and Fitness: Monitor and record weight, physical activities, exercise, and sporting interests and workouts within the Child Profile, Feedback, Chat, and Files sections. Nutrition and Weight Management: Record information relating to diet, appetite, and weight to potentially be used as part of tracking dietary intake, planning meals, managing diets, and supporting weight loss or weight management goals. Sleep Management: Record and track information related to the child's sleep patterns and quality. This could potentially be used for the purposes of improving and tracking sleep patterns and quality. Diseases and Conditions Management: Record and exchange information for managing health conditions and diseases and other health areas relevant to the child. Healthcare Services and Management: Schedule medical appointments, reminders, and manage health records in the Feedback, Chat and Files sections. Mental and Behavioral Health: Users are able to record information relating to mood and mental health. This could potentially be used as data points for the purposes of providing mental health and counseling services by relevant specialists in the child's team. Stress Management, relaxation and mental acuity: Record and track information related to the child's stress levels, mood, and mental acuity. This could potentially be used for managing stress, aiding relaxation and improving mental acuity. Dalza may also share resources in the Learn section that could be relevant for stress management, relaxation and mental acuity. Medical Reference and Education: Dalza makes available various resources in the Learn section that could be relevant for healthcare professionals, teachers, parents and other users. These resources are given for information purposes only and are not intended to be medical advice, therapeutic advice or other advice of any nature. Medication and Treatment Management: It is possible to record information relating to medication that is being taken and has been taken in the past. This could assist in managing medication schedules and ensuring adherence to treatment plans. Note that the ability of any user or team member to view, upload, download, contribute or use any of the Healthcare information above is subject always to the permissions given to a user by the child's legal guardian and these permissions can be changed by the legal guardian within Dalza at any time. Important: Remember to consult a healthcare professional for medical advice, diagnosis, or treatment. Terms of Use: https://app.dalza.com/terms-of-use

Screenshots

Simplex Spelling HD4 screens
Dalza4 screens

Verdict

The call

The clearest difference is price: Dalza at Free against Simplex Spelling HD's $4.99. Dalza also leads on update cadence (monthly vs every 3 months). Simplex Spelling HD's advantage is in-app purchases (none vs 10) and chart position (#148 vs unranked). On ads, 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

Dalza is free to download; Simplex Spelling HD costs $4.99 up front. Dalza sells 10 in-app purchases, starting at $18.00 per month. Simplex Spelling HD asks for nothing beyond the download.

UpkeepUpdate frequency

Simplex Spelling HD ships an update every 3 months, Dalza monthly. The most recent releases landed on October 22, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 7 level
Simplex Spelling HD versus Dalza: the parameters behind the verdict, then further details
ParameterSimplex Spelling HDDalza
Price$4.99Free — better
Rating3.2 (5 ratings) — better—
Positive reviews90.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
Best chart rank#148 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size134 MB51 MB
Age rating4+4+
DeveloperPyxwise Software Inc.Just Fair Terms, Unipessoal Lda

In-app purchases

None

Simplex Spelling HD

No in-app purchases

10 purchases

Dalza

Subscriptions10
  • Monthly for 2nd child$18.001 Month
  • Monthly for 3rd child$18.001 Month
  • Monthly for 4th child$18.001 Month
Show 7 more
  • Monthly for 5th child$18.001 Month
  • Monthly for 6th child$18.001 Month
  • Yearly for 2nd child$199.001 Year
  • Yearly for 3rd child$199.001 Year
  • Yearly for 5th child$199.001 Year
  • Yearly for 6th child$199.001 Year
  • Yearly for 4th child$199.001 Year

Questions

Is Simplex Spelling HD free?
Simplex Spelling HD costs $4.99, with no in-app purchases.
Is Dalza free?
Dalza is free to download, with in-app purchases available.
Do Simplex Spelling HD or Dalza have ads?
Neither Simplex Spelling HD nor Dalza shows ads.
Which is updated more often, Simplex Spelling HD or Dalza?
Simplex Spelling HD ships an update every 3 months, and Dalza monthly. Most recently, Simplex Spelling HD was updated on October 22, 2026 and Dalza on October 12, 2026.

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