DUO LINK 4 vs Kyros
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DUO LINK 4
Manage and transfer files between your iOS device and a USB flash drive. Free up storage, back up data, and even charge your device. Supports a wide range of file formats for seamless integration.
- Free up iPhone/iPad space
- Charge iOS devices
- Back up contacts
- Transfer photos and videos
- Store photos directly
- Manage files
- Music and video playback
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PNY DUO LINK 4 app, designed to work with DUO LINK OTG USB 3.0 Flash Drive brings you the ability to do more when it comes to file transfer, saving, sharing, accessing and streaming. Simply connect the DUO LINK OTG USB 3.0 Flash Drive to your iPhone and iPad and start syncing, transferring, sharing files, photos, videos and more with ease. DUO LINK OTG USB 3.0 is a flash drive designed for iPhone and iPad that enables you to free up space on your iOS device, save and protrect your contents into DUO LINK and even transfer then to your computer. DUO LINK OTG USB 3.0 also provides the ability for you to charge your iPhone and iPad. Features and Benefits: - Free up space on your iPhone or iPad. - Charge your iOS device. - Back-up your contacts. - Transfer and share your videos, photos and more. - Store photos directly into DUO LINK and save space on your iPhone or iPad. - Manage files on your iPhone, iPad and on DUO LINK. - Supports independent music and video playback. - Automatically back up your photos and videos so that you don't have to. Support: Please visit PNY Support at www.pny.com/support/technical-support Supported file formats: - video: M4V/MP4/MOV - Audio: M4A, CAF, AIFF, ASF, AAC, mp3, wav - Picture: TIFF, JPEG,JPG,PNG,GIF,BMP - Document: DOC, DOCX, PAGES, RTF, TXT , PPT, PPTX, PDF, XLS, XLSX, NUMBERS, KEY, HTML PNY takes no responsibility or liability with respect to the download or usage of DUO-LINK 4 app. By downloading this app you agree to the end user license agreement from PNY, also available at http://www.pny.com/File%20Library/Unassigned/PNY--On-the-Go-End-User-License-Agreement.pdf .
Kyros
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Work with your body, not against it. Most productivity apps force you into a single way of thinking. They give you a list, and maybe a calendar if you're lucky. Kyros is different. We believe your brain works differently depending on your energy, your environment, and the task at hand. That's why we've built more ways to view, manage, and analyze your productivity than every other app out there. Kyros transforms how you approach productivity by syncing your to-do list and habits with your body's natural energy rhythms. Using OPTIONAL data from Apple Health, Kyros calculates your real-time energy capacity and helps you tackle the right tasks at the right time. ▸ EVERY PERSPECTIVE YOU NEED Stop adapting to your tools and start using tools that adapt to you. Whether you need a simple List, a Kanban Board, an Eisenhower Matrix, or a specialized Rocks/Pebbles/Sand view, Kyros has it. We offer over 20 unique ways to visualize your work—more than any other personal productivity app. ▸ BASIC VIEWS • List View: Sorted by energy impact, category, and more. • Kanban Board: Drag-and-drop to "Done" with in horizontal or vertical layouts. • Calendar: Integrated tasks and schedule. Bring your own events with iCalendar (.ics) links. • Grid View: High-density spreadsheet-style overview. • Eisenhower Matrix: Smart prioritization by urgency and importance. ▸ ADVANCED METHODOLOGIES • Today Focus: Hyper-focus on your daily commitments. • Rocks/Pebbles/Sand: Master the classic time-management metaphor. • Time Blocking: Drag tasks directly onto your calendar. • Impact vs. Effort: Identify quick wins and avoid thankless tasks. • GTD Contexts: Filter by Location, Office, Focus, and more. You decide! • Pomodoro: Built-in focus timer with custom cycles. • Roulette: Beat decision paralysis with a random energy-aware task selection. ▸ DATA VISUALIZATIONS Don't just track tasks—understand your productivity soul with: • Density Heatmaps: See your peak output windows. • Debt Histograms: Track the age of your backlog. • Word Clouds: Identify themes in your overdue tasks. • Force Graphs: Explore connections between categories and habits. • Feelings Chart: See how your expectations match reality. • Burn-up Charts: Visualize your long-term progress. ▸ SUBJECTIVE FEEDBACK LOOP Tell Kyros "How Did It Feel?" after completing a task. We can help you learn from your experience to refine your future energy predictions. ▸ MINDFULNESS ECOSYSTEM Recharge with specialized meditation modes and an emergency anxiety/panic toolbox with breathing, anchoring, and reflection tools. ▸ PRIVACY-FIRST All your health data stays on your device. We believe your body's data is yours alone. No accounts required, no data harvesting. --- WHAT MAKES KYROS DIFFERENT? Traditional to-do apps treat every hour the same. But you're not a machine—your capacity to focus, create, and execute varies throughout the day. Kyros is the first task manager designed around this reality. --- FREE + PREMIUM ACCESS Kyros includes a free tier with up to 20 total tasks/habits and up to 5 active views. Premium features require an in-app purchase (monthly, yearly, or lifetime) and unlock unlimited tasks/habits, up to 10 active views, and advanced planning + analytics views. --- Kyros uses HealthKit to read your steps, activity, sleep, and mindfulness data to calculate your energy score. You control exactly what data to share. Health-related features are optional but will improve your app experience and give you the intended experience. Need help? Email us at support@enjetful.com Privacy Policy: https://enjetful.com/privacy Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: DUO LINK 4 at none against Kyros's 3. DUO LINK 4 also leads on iOS requirement (11.0 vs 17.0). On price, 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. Kyros sells 3 in-app purchases, starting at $3.99 per month. DUO LINK 4 asks for nothing beyond the download.
| Parameter | DUO LINK 4 | Kyros |
|---|---|---|
| Price | Free | Free |
| Rating | 2.1 (513 ratings) — better | — |
| Positive reviews | 19.8% of reviews | — |
| Number of ratings | 513 — better | — |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 123 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | PNY | Joshua Butler |
Bugs and requests
DUO LINK 4
Reported bugs
3 issues- App fails to detect connected device
- Transferred files not visible or accessible
- Inconsistent behavior when renaming folders
Requested features
4 requests- Add 'select all' option for photos/files
- Support for more file formats
- Improve iPad app experience
- Integrate with native Files app
Kyros
Not enough reviews yet to summarise bugs or requests.
In-app purchases
DUO LINK 4
No in-app purchases
Kyros
- Monthly Subscription$3.991 Month
- Yearly Subscription7 Days trial$35.991 Year
- Lifetime Subscription$99.99









