Comparison

FCJ Spelling vs Let's Build Sentences

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

Head to head
About

FCJ Spelling

This app helps users of all ages improve their spelling, with a focus on individuals with learning difficulties like dyslexia. It offers 10 weekly exercises designed to enhance reading and writing skills. Students can submit their progress to teachers directly through the app.

Highlights
  • Spelling exercises
  • Dyslexia support
  • Progress tracking
  • Teacher submission
  • Color overlay option
  • Student result management
Features
Read full description

This app aims to help people of all ages to improve their spelling with a special emphasis on learning difficulties such as dyslexia. Through weekly use and completion of the 10 exercises included in​ the app, users can significantly improve their spelling skills. Although FCJ Spelling is suitable for anybody wishing to improve their reading and writing skills, the app is specially tailored to students and teachers, allowing students to submit their work on the app to their teachers at the end of each week. Instructions for Use: Students: Students complete the 10 exercises each week. At the end of each week, the student submits their results to their teachers.Students can choose to have a transparent colour overlay while playing the exercises. Teachers: To view a student’s results simply tap Search for Results and enter the student’s username. Their name and username will then be saved to your device for future use. Once all your students have been added. You can press one button to gather all of your students' results in a table.

About

Let's Build Sentences

Features
Read full description

Let’s Build Sentences helps children learn to write real sentences with calm, guided handwriting practice designed for early learners. Choose from available natural-sounding system voices in Parent Settings to find a narrator that suits your child. Children hear letters, build words, trace shapes, and practise writing complete sentences one letter at a time using large child-friendly writing boxes and supportive feedback. Designed for home learning, phonics support, and early confidence-building, the app keeps sentence practice simple, structured, and encouraging. Whether your child is beginning to recognise letter sounds or starting to write full sentences independently, Let’s Build Sentences creates a positive daily writing routine without pressure or overwhelm. FEATURES • Guided sentence handwriting practice • Child-friendly sentence layout with large writing boxes • Helpful feedback that highlights letters needing another try • Trace letters mode for extra support • Tap letters to hear sounds while learning • Parent-led sentence creation • One-tap child-friendly sentence generation • Type mode and handwriting mode • Parent voice recordings for familiar learning support • Learning settings for spacing, capitals, and speech style • iCloud sync across devices (update every device for the latest sync improvements) • Daily goals, streaks and earned mastery stars • A grown-up check for settings and purchases • Reduce Motion support for onboarding and help • Calm encouragement and celebration after success FREE VERSION The free version includes starter sentence packs, handwriting practice, the built-in narrator, and one saved custom sentence. PREMIUM UNLOCK Unlock all sentence packs, unlimited saved custom sentences, parent voice recordings, badges and richer learning tools with a simple one-time purchase. WHY PARENTS LOVE IT • Makes sentence practice feel achievable • Supports phonics-based early learning • Builds confidence through repetition and guidance • Helps children practise independently • Creates a calm and encouraging writing routine • Flexible for different learning stages and abilities No subscriptions. No distracting ads. Just focused sentence practice designed for young learners.

Screenshots

FCJ Spelling4 screens
Let's Build Sentences4 screens

Verdict

The call

The clearest difference is in-app purchases: FCJ Spelling at none against Let's Build Sentences's 1. FCJ Spelling also leads on iOS requirement (9.0 vs 17.0). Let's Build Sentences's advantage is ads (none vs shown) and update cadence (every 4 days vs every 6 weeks). On price 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

Both are free to download. Let's Build Sentences sells 1 one-off in-app purchase. FCJ Spelling asks for nothing beyond the download.

UpkeepUpdate frequency

FCJ Spelling ships an update every 6 weeks, Let's Build Sentences every 4 days. Both last shipped on October 6, 2026.

Scorecard4 real differences · 5 level
FCJ Spelling versus Let's Build Sentences: the parameters behind the verdict, then further details
ParameterFCJ SpellingLet's Build Sentences
PriceFreeFree
Rating1.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 6 weeksEvery 4 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better17.0
Further details — not scored
Size41 MB5 MB
Age rating4+4+
DeveloperNiall KehoeBrian Leary

In-app purchases

None

FCJ Spelling

No in-app purchases

1 purchases

Let's Build Sentences

One-time1
  • Premium Unlock$4.99

Questions

Is FCJ Spelling free?
FCJ Spelling is free to download, with no in-app purchases.
Is Let's Build Sentences free?
Let's Build Sentences is free to download, with in-app purchases available.
Do FCJ Spelling or Let's Build Sentences have ads?
FCJ Spelling shows ads; Let's Build Sentences does not.
Which is updated more often, FCJ Spelling or Let's Build Sentences?
FCJ Spelling ships an update every 6 weeks, and Let's Build Sentences every 4 days. Most recently, FCJ Spelling was updated on October 6, 2026 and Let's Build Sentences on October 6, 2026.

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