Comparison

AI Chatbot & Writer vs DocLib Vault

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AI Chatbot & Writer

This AI assistant leverages advanced language models to help users with a wide range of tasks. It can generate text, translate languages, fix grammar, brainstorm ideas, and even write code. Get personalized assistance for writing, learning, and creative projects.

Highlights
  • AI Chatbot Assistance
  • Text Generation & Editing
  • Language Translation
  • Code Writing
  • Content Summarization
  • Grammar & Typo Correction
  • Idea Brainstorming
Read full description

KnowIt AI is your free AI Chatbot personal assistant (built on OpenAI’s ChatGPT API and GPT-4o). How does KnowIt AI Chat work? Simply ask KnowIt AI any question or task you need and the app will handle the rest. Here are just a few things you can do with KnowIt AI that will save you hours of time and effort: ● Write code for you ● Write and edit essays “Write a 500 word essay on the fall of the Roman Empire” ● Summarize an article or paragraph ● Find typos and grammar mistakes “Fix any typos in this article” ● Write social media captions ● Generate full video scripts for YouTube, TikTok, and Instagram videos/ads ● Brainstorm business ideas or names ● Translate your text or blog posts into any language ● Rewrite or improve text in paragraphs ● Ask AI to generate recipes based on the ingredients you have in your fridge or pantry ● Summarize a news article or blog post into key points ● Explain complex ideas "Explain this like I'm 5 years old" ● Help you with math problems ● Write marketing emails and social media ads ● Write SEO optimized blog posts “Write a blog post on the best AI Apps for iPhone using ‘ChatGPT’ as the main keyword” ———————————————————— ● No Login or email address required ———————————————————— Important note: Our app has been renamed from "KnowItAll AI" to "KnowIt AI". ———————————————————— Connect with us on X (formerly Twitter): @KnowItAllApp Have any questions or recommendations? Feel free to reach out to me at: Andrew@AndrewLee.Ventures Website: https://knowitallapp.com Privacy Policy: https://knowitallapp.com/privacy Terms and conditions: https://knowitallapp.com/terms

About

DocLib Vault

Securely store and organize photos, videos, documents, and notes locally on your device. Offers robust import options, advanced file management, and built-in viewers for various media types. Pro version unlocks deeper features like OCR and enhanced multi-play.

Highlights
  • Local-first private vault
  • Import from multiple sources
  • Folder and tag organization
  • Built-in viewers for various file types
  • Markdown and PDF editing
  • Encrypted backup and restore
  • Passcode and Face ID protection
Features
Read full description

DocLib is a local-first private vault for photos, videos, files, audio, and notes. Import from Photos, Files, Camera, document scan, direct HTTPS links, the Share Sheet, clipboard, Private Browser, or your computer over local Wi-Fi. No account required. Your content stays on your device by default unless you choose to export, share, or create a backup. Keep everything organized with folders and subfolders, tags, favorites, smart folders, filters, search, and Recently Deleted. Create secure Markdown or plain-text notes, convert supported PDFs and text files into Markdown, view Markdown with rich formatting, preview code files with syntax highlighting and line numbers, search inside PDFs, and mark up PDFs right in the app. Choose from built-in themes and app icons to make the vault feel like yours. DocLib is built for private everyday use: - Passcode and Face ID protection - Built-in viewers for photos, videos, audio, PDFs, Markdown, code, and common document types - Photo slideshows with interval controls - Photo and video Randomizer with folder selection, adjustable tile counts and timing, fit/fill, and optional automatic changes - Photo grids with up to 32 tiles - Custom browser homepages and startup tabs - Mute media for saved media and browser playback, with an info button explaining browser and system audio limitations - Video playback speed controls, mute, loop, mini-player behavior, and swipe-down actions - Multi-Play for watching multiple videos at once with shared controls for play/pause, mute, playback speed, filters, orientation, reordering, and add/remove - Video and audio trim tools, plus compression to save space - Fast import from the Share Sheet, Private Browser, clipboard, and local Wi-Fi Transfer - Encrypted backup and restore with reminder scheduling DocLib Pro adds deeper power features: - Deep Vault with separate passcode, biometrics, and reveal controls - Up to 12 video tiles in Multi-Play and Randomizer, plus duplicate Multi-Play tiles - Resume playback, background audio, and Picture in Picture - On-device OCR and full-text indexing for documents, PDFs, images, and many code/text formats - Selective restore from encrypted backups - Larger link downloads up to 5 GB - Video merge - Per-type library layouts, custom backgrounds, more app icons, and advanced privacy controls Private by default. Fast to use. Built for the things you actually want to keep. Have an idea? Send a feature request from the app. DocLib keeps getting better through real user feedback.

Screenshots

AI Chatbot & Writer4 screens
DocLib Vault4 screens

Verdict

The call

The clearest difference is ads: DocLib Vault at none against AI Chatbot & Writer's shown. DocLib Vault also leads on rating (5.0 vs 4.7). AI Chatbot & Writer's advantage is ratings volume (1.5K vs 2) and update cadence (monthly vs every 3 months). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. AI Chatbot & Writer sells 3 in-app purchases, starting at $6.99 per 7 days and DocLib Vault sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

DocLib Vault holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: AI Chatbot & Writer has 1.5K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

AI Chatbot & Writer ships an update monthly, DocLib Vault every 3 months. The most recent releases landed on October 22, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 6 level
AI Chatbot & Writer versus DocLib Vault: the parameters behind the verdict, then further details
ParameterAI Chatbot & WriterDocLib Vault
PriceFreeFree
Rating4.7 (1.5K ratings)5.0 (2 ratings) — better
Positive reviews86.4% of reviews—
Number of ratings1.5K — better2
Update frequencyMonthly — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS16.1 — better17.6
Further details — not scored
Size34 MB216 MB
Age rating17+17+
DeveloperAndrew Lee Ventures LLCTyler Mattingly

Customer experience

AI Chatbot & Writer

All ratings1,467 ratings
Positive93.6%
Neutral2.2%
Negative4.2%
Written reviews295 reviews
Positive86.4%
Neutral5.4%
Negative8.1%

DocLib Vault

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

AI Chatbot & Writer

Reported bugs

2 issues
  • Compatibility issues on certain devices (e.g., Mac)
  • Inconsistent performance or server overload

Requested features

3 requests
  • More customization options (e.g., dark mode)
  • Expanded content coverage and up-to-date information
  • Ability to use the AI assistant on other devices (e.g., keyboard integration)

DocLib Vault

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

AI Chatbot & Writer

Subscriptions3
  • KnowItAll Weekly$6.997 Days
  • KnowItAll Yearly: Discounted$19.991 Year
  • KnowItAll Yearly3 Days trial$39.991 Year
2 purchases

DocLib Vault

Subscriptions2
  • DocLib Pro Monthly$2.991 Month
  • DocLib Pro Yearly3 Months trial$19.991 Year

Questions

Is AI Chatbot & Writer free?
AI Chatbot & Writer is free to download, with in-app purchases available.
Is DocLib Vault free?
DocLib Vault is free to download, with in-app purchases available.
Which has better reviews, AI Chatbot & Writer or DocLib Vault?
DocLib Vault is rated higher. AI Chatbot & Writer averages 4.7 out of 5 from 1.5K ratings, while DocLib Vault averages 5.0 from 2 ratings.
Do AI Chatbot & Writer or DocLib Vault have ads?
AI Chatbot & Writer shows ads; DocLib Vault does not.
Which is updated more often, AI Chatbot & Writer or DocLib Vault?
AI Chatbot & Writer ships an update monthly, and DocLib Vault every 3 months. Most recently, AI Chatbot & Writer was updated on October 22, 2026 and DocLib Vault on October 12, 2026.

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