Omphalis vs SLATE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Omphalis
This app provides a unified space to save and understand various content like articles, podcasts, and notes. It structures information into digestible moments and highlights key points, offering a calm, focused experience without distractions.
- Unified content saving (articles, podcasts, PDFs, voice notes)
- Structured content breakdown into moments
- Automatic highlighting of key points
- Text-to-speech functionality with lock screen controls
- Automatic surfacing of connections within saved content
- Daily curated loop for focused review
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Omphalis is a calm home for the things you want to understand, not just get through. Save an article, a podcast, a YouTube talk, a PDF, or a voice note. Every one of them becomes the same clean, readable page, with structure you can actually use. What you get on the very first item Clean reading. Articles arrive without banners, popups, or clutter. PDF layouts are untangled. Podcasts and videos are transcribed. One calm page, whatever the source. Strata. Each piece is broken into typed moments, as many as its length and density call for, so you can see the shape of something before you read it and go straight to the part you came for. Marks. Omphalis quietly underlines the few things worth a second look: a source worth checking, a term worth defining, a claim worth following up. Keep the ones that earn it, dismiss the rest. Listen. Any saved item can be read aloud in a voice you pick, with lock screen controls. What you get as your library grows Connections. Omphalis surfaces what your own library already knew: a piece that echoes something you saved months ago, a claim that sits against another, a bridge between two topics you never filed together. It is descriptive, not predictive. It shows you your library, not a feed. Today. A short daily loop with a clear place to start and a clear place to stop. How it is built Your own thinking and other people's work go through the same pipeline and connect to each other equally. There is no separate bucket for your notes. Omphalis is custodial software. There is no trending tab, no infinite scroll, and no streak to keep alive. Today finishes. Suggestions, not verdicts. The system that picks moments and marks is fallible, and the app is built to show you that rather than hide it. Every suggestion has a keep or a dismiss beside it, and Settings names the substrate plainly. Your library, your data Sign in with Apple or Google. Export or delete your account and its contents from inside the app, at any time. What you can do Omphalis lets you save, read, and listen across your Library, Inbox, and Today.
SLATE
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Slate is a clean, modern PDF annotation app built for professionals, students, and anyone who works with documents. Import PDFs, review files, add annotations, sign documents, and export completed work—all from your iPhone or iPad. Whether you're reviewing contracts, completing forms, marking up plans, or organizing paperwork, Slate helps you stay focused with a simple, distraction-free workspace. FEATURES • Import and annotate PDF documents • Add text anywhere on the page • Create and place signatures • Insert dates, initials, and checkmarks • Highlight important information • Draw freehand with customizable pen tools • Add stamps and annotations • Save your progress and revisit documents later • Export and share completed PDFs • Designed specifically for iPhone and iPad BUILT FOR EVERYDAY WORK Slate is ideal for: • Business professionals • Contractors and field teams • Students and educators • Real estate professionals • Office administration • Anyone who regularly works with PDF documents SIMPLE BY DESIGN Slate was designed around one goal: making document markup fast and intuitive. Every feature is focused on helping you review, complete, and share documents without unnecessary complexity.
Screenshots
Verdict
The clearest difference is iOS requirement: Omphalis at 15.1 against SLATE's 26.5. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Omphalis | SLATE |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.5 |
| Further details — not scored | ||
| Size | 36 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Voxiven, LLC | Danielle Dockery |
In-app purchases
Omphalis
No in-app purchases
SLATE
No in-app purchases









