Comparison

why数理 vs Scrollie

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

Head to head
About

why数理

Features
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开发了三年的v1.0版即将发布,功能是此版的十倍。 本应用是一个为高中理科题设计的App,仅限讨论理科题目(数理化生等)。应用的主页展示关注的题目、待回答的题目等内容。题目页显示讨论的理科题。应用包含通知页。应用其余功能位于"我的"页,包括分屏、搜索、收藏、配色、小功能、设置、检查更新等等。

About

Scrollie

Effortlessly combine screen recordings, sequential screenshots, or single images into a single, seamless long screenshot. This tool simplifies capturing and editing chat histories, social feeds, web pages, and more, with on-device processing for privacy.

Highlights
  • Stitch screen recordings into long screenshots
  • Combine multiple screenshots seamlessly
  • Annotate, mosaic, and watermark images
  • Smart overlap detection and cleanup
  • Export to JPEG, PNG, HEIC, PDF
  • Auto-save drafts
  • URL Scheme and Shortcuts integration
Features
Read full description

Scrollie stitches screen recordings and sequential screenshots into one clean long screenshot, and can also pull frames from a video by subtitle line and stitch them into one movie-line image. New: • Subtitle stitch: drop in a video and keep one frame per subtitle line, with duplicates merged automatically; delete, add, swap or reorder frames as you like • Long screenshot blur: avatars, names, phone numbers and QR codes are detected automatically; tap to undo, long-press to pick words to blur Whether you are saving chat history, social feeds, web pages, documents, or notes, Scrollie makes capture, stitching, editing, and export easier. Key features: • Turn screen recordings into long screenshots, with automatic stop after scrolling ends • Stitch multiple screenshots into one seamless image, with more reliable long screenshot detection in manual stitching • Open a single image directly in the editor for annotation, mosaic, watermark, and export • Smart overlap detection and Smart Cleanup for more natural results and cleaner scrollbars • Export to JPEG, PNG, HEIC, PDF, or sliced images for different layouts and platforms • Slide to select multiple photos, and add more directly even under limited photo access • Auto-save drafts with separate portrait and landscape recovery • Use URL Scheme and Shortcuts to open the latest screenshot or screen recording • Optimized for iPhone and iPad, with improved dark mode and clearer save, share, and permission feedback Privacy first: All processing is done on-device. Your screenshots and recordings are not uploaded to our servers. Scroll, Stitch, Share. In-App Purchases: • Lifetime Pro Access • Pro Monthly Subscription (1 month) • Pro Annual Subscription (1 year) Prices may vary by region and are shown in the app before purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

why数理4 screens
Scrollie4 screens

Verdict

The call

The clearest difference is in-app purchases: why数理 at none against Scrollie's 3. why数理 also leads on iOS requirement (11.0 vs 16.0). On price, update cadence, 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. Scrollie sells 3 in-app purchases, starting at $0.99 per month. why数理 asks for nothing beyond the download.

UpkeepUpdate frequency

why数理 ships an update fortnightly, Scrollie weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 8 level
why数理 versus Scrollie: the parameters behind the verdict, then further details
Parameterwhy数理Scrollie
PriceFreeFree
Rating—4.7 (22 ratings) — better
Positive reviews—80.0% of reviews
Number of ratings—22 — better
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better16.0
Further details — not scored
Size71 MB51 MB
Age rating4+4+
Developer靖一 陈锋 邹

In-app purchases

None

why数理

No in-app purchases

3 purchases

Scrollie

Subscriptions2
  • Pro Monthly$0.991 Month
  • Pro Yearly$6.991 Year
One-time1
  • Lifetime Pro Access$9.99

Questions

Is why数理 free?
why数理 is free to download, with no in-app purchases.
Is Scrollie free?
Scrollie is free to download, with in-app purchases available.
Do why数理 or Scrollie have ads?
Neither why数理 nor Scrollie shows ads.
Which is updated more often, why数理 or Scrollie?
why数理 ships an update fortnightly, and Scrollie weekly. Most recently, why数理 was updated on November 3, 2026 and Scrollie on November 5, 2026.

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