CloudVault vs Lumen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CloudVault
Transform your private Telegram channel into secure cloud storage. Upload photos, videos, and documents directly from your device and manage them easily. Your data remains under your control, stored exclusively within your Telegram channel.
- File Upload (photos, videos, PDFs, documents)
- File Manager
- Sync Deletion
- Private Telegram Channel Storage
- Easy Telegram Bot Setup
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CloudVault transforms your private Telegram channel into a personal cloud storage vault — right from your iPhone. Simply connect your Telegram bot once, and start uploading photos, videos, PDFs, and documents directly from your device. Everything is stored securely in your own private Telegram channel, giving you full control over your data. Key Features: File Upload — Upload photos, videos, PDFs, and documents from your iPhone instantly. File Manager — Browse and manage all your uploaded files in one clean, organized interface. Sync Deletion — Delete a file in CloudVault and it's automatically removed from your Telegram channel too. Your Data, Your Control — Files are stored in your own private Telegram channel. No third-party servers. No data collection. Easy Setup — Connect your Telegram bot in minutes and start uploading right away. How It Works: Create a private Telegram channel and bot Connect your bot inside CloudVault Upload and manage your files anytime CloudVault is perfect for anyone looking for a simple, private, and reliable way to store and access their files using Telegram's infrastructure.
Lumen
This app acts as a browser that remembers what you read, building a personal knowledge base from engaged pages. It allows you to ask questions in plain English about your reading history, with answers generated by an on-device AI. All your data remains private and offline.
- On-device AI knowledge base
- Plain English questioning
- Automatic content organization
- Private and offline browsing
- Tracker blocking
- Source citation for answers
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Lumen is a browser with a memory. Most browsers forget the second you close a tab. Lumen does not. As you read, it quietly builds a personal knowledge base from the pages you actually engage with, and then lets you ask questions about any of it in plain English, answered by an AI model that runs entirely on your device. Nothing you read, nothing you ask, and nothing Lumen learns about you ever leaves your phone. WHAT IT DOES Lumen reads along with you. It distinguishes between pages you genuinely read and pages you opened and swiped away, and it extracts the meaningful content from the ones that stuck. That content gets summarized, embedded, and organized into a searchable knowledge base, all on-device. Later, when you want to find something, you do not have to dig through history or remember which tab it was in. You just ask: "What did I read about sourdough starters last week?" "Summarize that article about the new M-series chips." "What were the main arguments in that piece I read on Tuesday?" Every answer cites the pages it came from, so you can jump straight back to the source. AUTO-ORGANIZED Your reading sorts itself into a clean hierarchy: Topics, Websites, and Pages. Each level carries its own AI-generated summary, so you can scan what you have been learning at a glance. No tagging, no folders to maintain. Lumen handles it in the background. PRIVATE BY DEFAULT Lumen has no server. There is quite literally nothing to send. On-device LLM: a quantized Llama 3.2 model runs locally through Apple's MLX framework. Local SQLite storage: your reading history, summaries, and embeddings never leave the device. Built-in privacy: tracker blocking, third-party cookie blocking, and fingerprint resistance. Secure: HTTPS-only by default, with mixed-content blocking. No strings attached: no accounts, no sync, no telemetry, no ads. The AI weights download once on first launch (~700 MB). After that, everything works fully offline: browsing, reading, asking, answering. BUILT FOR iOS Lumen is written from scratch in Swift and SwiftUI, designed specifically for iPhone and iPad. It uses Apple's own frameworks wherever it can: NLEmbedding for semantic search, WKWebView for browsing, SQLite with FTS5 for full-text queries, and MLX Swift for on-device inference. Zero third-party trackers. Zero external services. WHO IT'S FOR While most browsers treat the web as a feed to scroll past, Lumen treats it as a library worth keeping. If you read a lot online and constantly think "I know I saw something about this recently but I cannot find it again," Lumen is for you. Researchers, students, writers, developers, and lifelong learners. You do not need to change how you browse. Browse normally, and Lumen takes care of the rest. REQUIREMENTS iOS 18 or later. iPhone with Apple Silicon recommended for the fastest on-device AI performance.
Screenshots
Verdict
The clearest difference is ratings volume: Lumen at 4 against CloudVault's 1. Lumen also leads on iOS requirement (18.0 vs 26.2). On price, rating, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for CloudVault against 5.0 for Lumen. Both are backed by a comparable volume of ratings — 1 and 4 respectively.
| Parameter | CloudVault | Lumen |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (4 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 4 — better |
| Update frequency | — | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.2 | 18.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 28 MB |
| Age rating | 12+ | 17+ |
| Developer | Nagarjuna Reddy Bhimavarapu | Daniel Kosukhin |
In-app purchases
CloudVault
No in-app purchases
Lumen
No in-app purchases









