JJY Simulator vs Scrollie
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JJY Simulator
This utility app simulates standard radio waves used by Japanese radio-controlled clocks. It outputs a 13.3kHz audio signal to synchronize your clock, allowing you to manually set the time.
- Simulates JJY standard radio waves
- Outputs 13.3kHz audio signal
- Synchronizes radio-controlled clocks
- Uses 40kHz for time adjustment
- Requires earphone connection
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日本で市販されている電波時計をiPhoneで合わせるユーティリティです。 日本の電波時計の基準局(JJY)で使用される標準電波を模擬した信号を、13.3kHzの音声として出力し、3倍高調波(40kHz)を利用して時刻を合わせます。 1. イヤホンをiPhoneのイヤホンジャックに接続し、電波時計のすぐそばに置きます。 2. 音量を最大に設定します。 3. 「音声信号を出力」をオンにします。 4. 電波時計を強制受信モードにし、時刻が合うまで数分間待ちます。
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.
- 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
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Scrollie turns screen recordings, sequential screenshots, or even a single image into a clean, seamless long screenshot in seconds. 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
Verdict
The clearest difference is rating: Scrollie at 4.7 against JJY Simulator's 4.2. Scrollie also leads on update cadence (weekly vs every 66 months) and review sentiment (80% vs 68%). JJY Simulator's advantage is in-app purchases (none vs 3) and iOS requirement (8.0 vs 16.0). On price, ratings volume, 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
Both are free to download. Scrollie sells 3 in-app purchases, starting at $0.99 per month. JJY Simulator asks for nothing beyond the download.
Scrollie holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 19 and 22 respectively. Written reviews point the same way: 68% of JJY Simulator's written reviews are positive against 80% of Scrollie's.
JJY Simulator ships an update every 66 months, Scrollie weekly. The most recent releases landed on October 23, 2026 and October 31, 2026 respectively.
| Parameter | JJY Simulator | Scrollie |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (19 ratings) | 4.7 (22 ratings) — better |
| Positive reviews | 68.1% of reviews | 80.0% of reviews — better |
| Number of ratings | 19 | 22 — better |
| Update frequency | Every 66 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | NeoCat | 锋 邹 |
Customer experience
JJY Simulator
Scrollie
In-app purchases
JJY Simulator
No in-app purchases
Scrollie
- Pro Monthly$0.991 Month
- Pro Yearly$6.991 Year
- Lifetime Pro Access$9.99
