ThreadBook vs AcuSpark2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThreadBook
Manage your sewing, needlework, and embroidery threads with a comprehensive digital library. Track your existing threads, create shopping lists, and find perfect color matches using advanced search or your device's camera. Instantly convert thread colors between brands and types.
- Extensive thread library (50,000+ threads)
- Track 'My Threads' and 'Shopping List'
- Search by thread number or color
- Color matching via camera or photo
- Instant cross-brand thread conversion
- Automatic library updates
- Cross-device synchronization
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Description ThreadBook is the ideal tool for managing the threads you use for sewing, needlework, or embroidery. It contains a library of more than 50,000 threads from over 600 different manufacturers, available with a touch of your finger. Using ThreadBook you can: * Set your favorite brands to narrow matching choices * Track the threads you have in the “My Threads” collection * Track the threads you need in the “Shopping List” collection * Find threads with a particular thread number, including partial numbers * Find threads that match your chosen color * Find threads that match any color using the camera on your device or a previously made photo * Instantly create a chart to convert any brand and type of thread to a matching color in any other brand and type * Create your own charts for converting any brand to the best match in one or more other brands * Convert a list of thread colors, such as that often provided with embroidery designs, to any brand and type Additional features include: * One tap instant match for any thread * Automatic updating of the library as new threads are added * Your “My Threads” and “Shopping List” collections are synchronized between all your devices
AcuSpark2
This app guides you through using your sewing machine with clear instructions and helpful tips. It can scan QR codes on your machine to provide specific guidance and inspiration, even without a connected device.
- Sewing machine usage instructions
- QR code scanning for machine status
- Step-by-step sewing method videos
- Presser foot descriptions
- Stitch chart
- Multilingual support
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AcuSpark2 is an app that explains how to use the sewing machine and provides useful tips. Read the QR code displayed on the sewing machine screen with AcuSpark2 and all your questions will be answered. AcuSpark2 can also be used without a sewing machine. The app acts as a concierge, offering support and inspiring new ideas. AcuSpark2 is compatible with the following sewing machine models: Please refer to the following link : https://www7.janome.co.jp/global/softupdate/acuspark2/ Reading QR codes (linking with sewing machine): * When the QR codes displayed on the sewing machine screen are read with AcuSpark2, instructions and know-how related to the status of the sewing machine appear in the app. Features: * Offers basic knowledge on how to use the sewing machine. * Step-by-step illustrative videos for learning special sewing methods are available. * Presser foot descriptions (including optional items) * Includes a stitch chart containing the sewing machine's built-in stitches Supported languages are as follows: * English * French * Spanish * Japanese * Changing language settings Language settings can be adjusted through device settings (Settings -> General -> Language & Region). (Method may vary depending on device.) Notes: * An internet connection is required to download the data and the communication charges shall be borne by the customer. * The email address development@gm.janome.co.jp is for feedback only and no replies will be sent to emails received. Your feedback is greatly appreciated.
Screenshots
Verdict
The clearest difference is price: AcuSpark2 at Free against ThreadBook's $14.99. AcuSpark2 also leads on iOS requirement (15.0 vs 17.1). ThreadBook's advantage is rating (4.2 vs 2.7) and review sentiment (66% vs 33%). On ads, in-app purchases, monetization model 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
AcuSpark2 is free to download; ThreadBook costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ThreadBook holds the better App Store score, 4.2 against 2.7. That said, the two scores are not equally well evidenced: ThreadBook has 52 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 66% of ThreadBook's written reviews are positive against 33% of AcuSpark2's.
ThreadBook ships an update monthly, AcuSpark2 every 8 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.
| Parameter | ThreadBook | AcuSpark2 |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 4.2 (52 ratings) — better | 2.7 (3 ratings) |
| Positive reviews | 65.9% of reviews — better | 33.3% of reviews |
| Number of ratings | 52 — better | 3 |
| Update frequency | Monthly — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #199 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 138 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | Software Miracles | JANOME Corporation |
Customer experience
ThreadBook
AcuSpark2
In-app purchases
ThreadBook
No in-app purchases
AcuSpark2
No in-app purchases








