RAYVOLT EIVA 2.0 vs Purl.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RAYVOLT EIVA 2.0
Access and adjust your electric bike's settings directly from your smartphone. Monitor real-time performance data like speed, battery, and assistance levels. Customize advanced parameters to personalize your riding experience.
- Access bike settings
- Monitor real-time speed
- View battery status
- Check amperage
- Adjust pedal assistance
- Modify advanced settings
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With EIVA app you will access to all your bike settings. Please make sure you have turn on bluetooth in your device. Once time you connect you can see following parameters in real time: - Speed. - Battery - Amperage - Pedal assistance level You can adjust your favourite settings on "Advanced settings" section where you can modify "acceleration" , "pedal assistance ratio", "voltage"...etc Join the Rayvolution!
Purl.
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Purl is the ultimate companion for knitters and crocheters. Everything lives locally on your device, with no account, no sign-up, and no ads. All features are completely free, always. PROJECTS • Track what you're making, from planned to finished. • Add yarn, needle or hook size, and the gauge you actually got. • View a timeline of all your projects. • Add progress photos with personal notes. PATTERNS • Keep your own written patterns and imported PDFs in one library. • Open PDF patterns, even very large ones, and pinch to zoom, fully offline. • Draw, highlight, add sticky notes, and drop bookmarks. • Row counters and a chart stitch tracker built for following along. YARN STASH • Log your yarn with color, dye lot, weight, fiber, and gauge. • See your stash totals in meters and grams. • Sort and filter to find the right yarn, and match it to a pattern in your library. HANDY TOOLS • Quick standalone counters for anything you need to count. • Craft calculators for gauge, resizing, shaping, and calculation total skeins needed. • A built-in chart maker: design your own chart from scratch, or let Purl generate them directly from a photo. • A comprehensive knit and crochet glossary in both English and Norwegian. MADE TO FEEL RIGHT • Available in both English and Norwegian. • Switch between light and dark mode. • A two-pane layout on iPad and larger screens. • Easily backup and restore everything to a single file. Purl is completely free, with no locked features. If the app helps you, there is an option to leave a tip on the Support Purl page, but nothing is ever put behind a paywall. And lastly, your data stays yours: it lives exclusively on your device unless you actively choose to export it.
Screenshots
Verdict
The clearest difference is in-app purchases: RAYVOLT EIVA 2.0 at none against Purl.'s 3. RAYVOLT EIVA 2.0 also leads on iOS requirement (13.6 vs 15.1). 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
Both are free to download. Purl. sells 3 one-off in-app purchases. RAYVOLT EIVA 2.0 asks for nothing beyond the download.
RAYVOLT EIVA 2.0 ships an update every 2 weeks, Purl. monthly. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.
| Parameter | RAYVOLT EIVA 2.0 | Purl. |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (4 ratings) — better | — |
| Positive reviews | 21.4% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.6 — better | 15.1 |
| Further details — not scored | ||
| Size | 98 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Exxite Bike S.L | Pierre Boniface |
In-app purchases
RAYVOLT EIVA 2.0
No in-app purchases
Purl.
- Buy me a coffee$1.99
- Buy me a skein$5.99
- Big thank-you$11.99









