Comparison

BioFlash vs Triangle Sketch

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

Head to head
About

BioFlash

Features
Read full description

Turn a quick question into a clearer understanding. BioFlash brings together focused explanations, visual references and quizzes for study at your own pace. EXPLORE Cells, DNA, inheritance, evolution, plants, body systems, immunity and relationships in nature. SUBJECT TOOLS References for cells, biological processes, anatomy and genetics, with diagrams and concise facts. MAKE YOUR STUDY TIME COUNT - Browse topics and search for the concept you need. - Save favorites in their own screen and track what you have read. - Build quizzes by topic, review answers and follow your results. - Choose a comfortable text size, color theme and light or dark appearance. Learning content and quizzes are available in 14 languages: English, Albanian, German, French, Spanish, Italian, Portuguese, Turkish, Arabic, Hindi, Indonesian, Vietnamese, Simplified Chinese and Traditional Chinese. Learning content is stored on your device. Favorites and progress stay local, with no app account required. Internet is needed for purchases and subscription checks. Try the app with a 10-minute local preview, started by you. It does not start a subscription. Continued access requires an annual subscription. The current price and any eligible introductory offer are shown by your store before confirmation. Subscriptions renew automatically unless canceled in your store account. Subscription access needs periodic online verification. Privacy policy and terms of use: https://sites.google.com/view/etemidev/privacy-policy-bioflash

About

Triangle Sketch

This geometry tool allows users to draw and manipulate triangles on a graph. It provides measurements, allows editing of sides and angles, and displays various triangle facts and properties. It's designed to help students visualize geometric concepts.

Highlights
  • Draw triangles on a graph
  • Edit side lengths and angles
  • View triangle measurements
  • Explore triangle properties
  • Use right-triangle trig tools
  • Customize display options
Features
Read full description

Triangle Sketch is a hands-on geometry tool for drawing and exploring triangles. Draw a triangle with your finger, check its measurements, edit side lengths and angles, move vertices, enter coordinates, and view useful triangle facts. Triangle Sketch helps students see how triangle measurements connect instead of only reading formulas. Features: • Draw triangles directly on a graph • Edit side lengths, angles, and vertex coordinates • Work with any triangles and right triangles • View area, perimeter, triangle type, height, centroid, incircle, and circumcircle • Use right-triangle trig tools • Change units, decimals, colors, grid snapping, and display options • One-time hints help students discover important tools Triangle Sketch is designed for students, teachers, and anyone learning geometry.

Screenshots

BioFlash4 screens
Triangle Sketch4 screens

Verdict

The call

The clearest difference is price: BioFlash at Free against Triangle Sketch's $0.99. Triangle Sketch's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 7 months). 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

BioFlash is free to download; Triangle Sketch costs $0.99 up front. BioFlash sells 1 in-app purchase, starting at $9.99 per year. Triangle Sketch asks for nothing beyond the download.

UpkeepUpdate frequency

BioFlash ships an update every 7 months, Triangle Sketch monthly. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 6 level
BioFlash versus Triangle Sketch: the parameters behind the verdict, then further details
ParameterBioFlashTriangle Sketch
PriceFree — better$0.99
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 7 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Paid
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better17.6
Further details — not scored
Size44 MB5 MB
Age rating9+4+
DeveloperGentiana EtemiEduardo Longoria Alaniz

In-app purchases

1 purchases

BioFlash

Subscriptions1
  • BioFlash Premium3 Days trial$9.991 Year
None

Triangle Sketch

No in-app purchases

Questions

Is BioFlash free?
BioFlash is free to download, with in-app purchases available.
Is Triangle Sketch free?
Triangle Sketch costs $0.99, with no in-app purchases.
Do BioFlash or Triangle Sketch have ads?
Neither BioFlash nor Triangle Sketch shows ads.
Which is updated more often, BioFlash or Triangle Sketch?
BioFlash ships an update every 7 months, and Triangle Sketch monthly. Most recently, BioFlash was updated on October 24, 2026 and Triangle Sketch on October 18, 2026.

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