Next Deck vs 4DI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Next Deck
Manage your Nextcloud Deck boards, columns, and cards with this fast, intuitive client. Organize tasks using drag-and-drop, labels, due dates, and assignees. Supports markdown descriptions, comments, attachments, and search for efficient project management.
- Drag and drop card management
- Color-coded labels for organization
- Due date indicators
- Assign tasks to teammates
- Markdown descriptions and comments
- Fast search functionality
- Optimized for iPhone and iPad
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Nextdeck is the modern, lightning‑fast client for Nextcloud Deck — perfect for Kanban, tasks, and projects. Keep boards, columns, and cards under control at all times: move cards via drag and drop, edit details, and keep your overview — on iPhone and iPad, in light and dark mode. Highlights - Drag & drop: move cards within a column or across columns — precise and intuitive. - Reorder & positions: insert cards exactly before another card or move up/down. - Labels & colors: instant orientation with color coding. - Due dates: clear urgency colors for upcoming deadlines. - Assignees: assign teammates and make responsibility visible. - Markdown description: jot down details, neatly previewed on the card tile. - Comments & attachments: compact counters right on the card. - Search: find cards quickly without endless scrolling. - Optimized for iPhone & iPad: compact lists on iPhone, wide columns on iPad. - Dark mode & smart colors: pleasant contrast and great readability. - Privacy‑friendly: your data stays on your own Nextcloud server. Why Nextdeck? - Speed focus: smooth scrolling, snappy interactions, minimal waiting. - Clean, native UI: feels right from the first tap. - Reliable sync: changes persist cleanly with Nextcloud Deck. Requirement: a running Nextcloud instance with the Deck app enabled. Sign in with server URL, username, and app password — done.
4DI
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4DI is an offline reference tool for data integrity in regulated environments — built for QA, validation, manufacturing, and laboratory teams working under GxP. The app organizes data integrity knowledge into five areas: ALCOA++ principles, regulatory frameworks, the data lifecycle, typical inspection findings, and a glossary. ALCOA++ PRINCIPLES 10 principles, each with a clear definition and practical examples contrasting good practice with a typical violation: - Attributable - Legible - Contemporaneous - Original - Accurate - Complete - Consistent - Enduring - Available - Traceable (added per the EMA guideline on computerised systems and electronic data in clinical trials, 2023) REGULATORY FRAMEWORKS 7 frameworks side by side, each with a summary, core requirements, and a link to the official source: - FDA 21 CFR Part 11 - EU GMP Annex 11 - MHRA GxP Data Integrity Guidance - EMA Guideline on computerised systems and electronic data in clinical trials (2023) - PIC/S PI 041 - WHO TRS 1033, Annex 4 — Guideline on data integrity (2021) - ICH Q7 Frameworks are tagged by region (US / EU / International). A comparison view highlights key differences across four topics: audit trail, electronic signatures, risk-based approach, and quality culture & human factors. DATA LIFECYCLE Six phases — Creation, Processing, Review & Approval, Reporting, Retention, Archival & Destruction — each mapped to its relevant ALCOA++ principles, typical pitfalls, and regulatory focus. INSPECTION FINDINGS 17 findings modeled on public patterns from FDA Warning Letters, Form 483 observations, and EU GMP non-conformities. Organized by category and severity, each finding lists the principles violated, its regulatory basis, and remediation measures, with links to official databases. Full search included. GLOSSARY 29 terms — ALCOA terms, regulatory abbreviations (CFR, GMP, GLP, GCP...), technical terms (audit trail, metadata, electronic signature), and quality terms (CAPA, deviation, OOS) — each with a definition and context. Bookmark terms for quick access, get a "term of the day," and search even without typing accents. FIVE LANGUAGES 4DI speaks English, German, French, Spanish and Italian. A new installation starts in your iPhone's language when 4DI supports it. You can switch the language any time in the app's Settings. BUILT FOR OFFLINE USE Light, dark, or system appearance. Works entirely offline: no accounts, no tracking, no ads, no permissions required. Bookmarks stay on your device. COMMUNITY & SUPPORT Report a bug, suggest a feature, or flag a content correction through the app's Settings — linked to robspace's public GitHub hub for discussion. For direct support: support@robspace.de. DISCLAIMER: 4DI is a privately developed helping tool. It is not endorsed, certified, or validated by any regulatory authority. Content is for informational purposes only and must not replace official regulatory guidance or professional advice.
Screenshots
Verdict
The clearest difference is price: 4DI at Free against Next Deck's $3.99. 4DI also leads on iOS requirement (18.6 vs 26.2). On update cadence, ads, in-app purchases 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
4DI is free to download; Next Deck costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Next Deck ships an update weekly, 4DI every 5 days. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.
| Parameter | Next Deck | 4DI |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 2.6 (5 ratings) — better | — |
| Positive reviews | 76.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Weekly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.2 | 18.6 — better |
| Further details — not scored | ||
| Size | 28 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Holger Heidkamp | Robert Poetzsch |
In-app purchases
Next Deck
No in-app purchases
4DI
No in-app purchases









