Comparison

Memex vs Split & Merge PDF

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

Head to head
About

Memex

Organize your Markdown notes and PDFs on an infinite canvas. Connect documents, sketch with Apple Pencil, and use an AI chat to ask questions about your gathered information. Your files remain private and accessible via iCloud Drive.

Highlights
  • Infinite canvas for notes and PDFs
  • AI chat to query your documents
  • Apple Pencil handwriting and sketching
  • Markdown rendering as live cards
  • Organize and connect content with arrows
  • Export content as images
Features
Read full description

Memex puts your Markdown notes and PDFs on an infinite canvas, with an AI chat that reads them. Any document can sit on the canvas as a live, readable card. Arrange and connect your cards, write around them with Apple Pencil, and ask the chat about what you have gathered. ON THE CANVAS - Markdown documents render as live cards, not links - PDFs sit on the canvas as cards showing their first page - Draw arrows between cards and gather them into groups - Handwrite and sketch next to your typed notes with Apple Pencil - On iOS 27, search finds your handwriting as well as your typed notes - Push cards to another canvas as your thinking changes - Type @ to link to anything in your library, or @here to link the spot you are on - Add text, code blocks, tables, images and embeds CHAT WITH YOUR NOTES - Add a card, a whole document or a PDF to the chat, or type straight in - Ask about your notes in plain words - Put any reply back on your canvas as a card - The chat is there on canvases, documents and PDFs MAKE IMAGES - Select typed text, or handwriting on iOS 27, and tap Make image - The picture lands on your canvas and in your library YOUR FILES STAY YOURS - Documents and canvases are plain files in your iCloud Drive, visible in the Files app - No Memex account, no lock-in - The AI sees only what you add to the chat. Your messages and that context go through our server, which stores none of it, to OpenAI via OpenRouter BUILT FOR IPAD AND APPLE PENCIL Memex is designed for iPad first, with Pencil writing directly on the canvas. It also runs on iPhone and Mac. ONE SUBSCRIPTION One Memex subscription unlocks the complete app, including 500 AI credits a month: a chat message uses 1 credit and an image uses 10. Credits reset on the 1st of each month (UTC) and don't roll over. Take the hands-on welcome tour, then try the chat with 5 free messages before you subscribe. Eligible new subscribers get a 7-day free trial. Choose $9.95 monthly or $79.99 yearly. Subscriptions renew automatically until cancelled in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Split & Merge PDF

Easily split, merge, and reorder pages within PDF documents directly on your iPhone. This straightforward tool allows you to select specific pages, rearrange their order, and export them as a new PDF without needing an account or subscription.

Highlights
  • Import PDFs from Files
  • View pages in a grid
  • Select and reorder pages
  • Export as new PDF
  • Merge multiple PDFs
  • Remove pages
Features
Read full description

Split, merge, and reorder PDF pages right on your iPhone. No subscription and no account. Split & Merge PDF keeps things simple. Open a PDF, see every page as a thumbnail, pick the pages you want, and export. That is the whole app. What you can do: • Import any PDF from Files • View all pages in a scrollable grid • Tap to select pages, then drag to reorder them • Export the pages you picked as a new PDF through the share sheet • Merge several PDFs into one document • Long-press a page to remove it Pricing is simple. Exports of up to 5 pages are free. A single $2.99 purchase removes the limit for good, with nothing to renew. A few things this app does not do: no cloud sync, no accounts, no analytics, no ads, no OCR, and no scanning. Your PDFs stay on your device and nothing is uploaded. Made by Infamous Endeavors.

Screenshots

Memex4 screens
Split & Merge PDF4 screens

Verdict

The call

The clearest difference is in-app purchases: Memex at none against Split & Merge PDF's 1. Split & Merge PDF's advantage is update cadence (weekly vs fortnightly) and ratings volume (4 vs 1). On price, rating, ads and monetization model 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. Split & Merge PDF sells 1 one-off in-app purchase. Memex asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Memex against 5.0 for Split & Merge PDF. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

Memex ships an update fortnightly, Split & Merge PDF weekly. Both last shipped on October 31, 2026.

Scorecard3 real differences · 7 level
Memex versus Split & Merge PDF: the parameters behind the verdict, then further details
ParameterMemexSplit & Merge PDF
PriceFreeFree
Rating5.0 (1 ratings)5.0 (4 ratings)
Positive reviews—100.0% of reviews
Number of ratings14 — better
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better18.0
Further details — not scored
Size35 MB2 MB
Age rating4+4+
DeveloperAlex MorrisInfamous Endeavors LLC

Customer experience

Memex

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Split & Merge PDF

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Memex

No in-app purchases

1 purchases

Split & Merge PDF

One-time1
  • Unlock Unlimited Exports$2.99

Questions

Is Memex free?
Memex is free to download, with no in-app purchases.
Is Split & Merge PDF free?
Split & Merge PDF is free to download, with in-app purchases available.
Which has better reviews, Memex or Split & Merge PDF?
Memex and Split & Merge PDF are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.
Do Memex or Split & Merge PDF have ads?
Neither Memex nor Split & Merge PDF shows ads.
Which is updated more often, Memex or Split & Merge PDF?
Memex ships an update fortnightly, and Split & Merge PDF weekly. Most recently, Memex was updated on October 31, 2026 and Split & Merge PDF on October 31, 2026.

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