Comparison

Grass Fire vs Sight words

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

Head to head

Grass Fire

Testing visual perception

Free

📚 Education

★ 1.03 ratingsView app →

Sight words

Flash cards picture + word

Free

📚 Education

No ratingsView app →

About

Grass Fire

This educational app explores how the human brain interprets visual shapes. It's designed to help users understand the cognitive processes behind shape recognition and perception.

Highlights

Understanding shape interpretation
Cognitive process exploration
Visual perception testing
Educational content

Features

Read full description

Grass Fire helps players understand how our brains understand what shapes represent.

About

Sight words

Read full description

NO ADS - EVER. Kids learn first sight words easily while having fun!. Learn at your own place. Also great for people with Autism, and other special needs individuals as well. Over 100 3-letter, 4-letter, and 5-letter words included! Fun, easy, learning. Supports Dynamic Type, VoiceOver, Voice Control, Increase Contrast, Bold Text and Dark mode iOS / iPadOS accessibility features. (Enable them in Settings app --> Accessibility.)

Screenshots

Grass Fire4 screens

Sight words4 screens

Verdict

The call

The clearest difference is in-app purchases: Grass Fire at none against Sight words's 5. Grass Fire also leads on iOS requirement (12.0 vs 17.0). Sight words's advantage is update cadence (every 6 weeks vs every 15 months). On price, 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

Both are free to download. Sight words sells 5 one-off in-app purchases. Grass Fire asks for nothing beyond the download.

UpkeepUpdate frequency

Grass Fire ships an update every 15 months, Sight words every 6 weeks. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 6 level

Grass Fire versus Sight words: the parameters behind the verdict, then further details
Parameter	Grass Fire	Sight words
Price	Free	Free
Rating	1.0 (3 ratings) — better	—
Number of ratings	3 — better	—
Update frequency	Every 15 months	Every 6 weeks — better
Ads	No	No
In-app purchases	No — better	Yes
Monetization	Free	—
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	12.0 — better	17.0
Further details — not scored
Size	66 MB	70 MB
Age rating	4+	4+
Developer	arludo Pty Ltd	Nuclear Cyborg Corp

In-app purchases

None

Grass Fire

No in-app purchases

5 purchases

Sight words

One-time5

Lifetime Unlock$4.99
Lifetime unlock$6.99
Lifetime Unlock$9.99

Show 2 more

Lifetime Unlock$12.99
Lifetime Unlock$19.99

Questions

Is Grass Fire free?

Grass Fire is free to download, with no in-app purchases.

Is Sight words free?

Sight words is free to download, with in-app purchases available.

Do Grass Fire or Sight words have ads?

Neither Grass Fire nor Sight words shows ads.

Which is updated more often, Grass Fire or Sight words?

Grass Fire ships an update every 15 months, and Sight words every 6 weeks. Most recently, Grass Fire was updated on October 21, 2026 and Sight words on October 25, 2026.