Comparison

MarkMind vs The Abyss

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

Head to head
About

MarkMind

Features
Read full description

Markdown Opener is the no‑drama way to read and study Markdown, PDF, and DOCX. Drag from Files, switch native/web preview, then let AI TL;DR your doc and spin up A–D flashcards for speed‑runs. Export to CSV, manage files, and keep study mode tight for exams, lectures, and content drafts. Open .md, .pdf, .docx from Files or share sheet Clean reader with native + web preview AI chat for TL;DR, outline, key points Auto‑generate 10–15 MCQ flashcards (A–D) Study mode with instant feedback Export flashcards to CSV for backup/print File ops: Save As, rename, share, duplicate, delete PDF/DOCX are read‑only; edit by saving as Markdown Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://markmind.web.app/privacypolicy.html

About

The Abyss

Features
Read full description

The Abyss is the iOS companion for Hermes - your self-hosted AI agent running on your own machine. Connect over your local network or Tailscale, send prompts, watch the agent think and reach for tools in real time. The Abyss is a remote control. Hermes is the brain. You own both. Built for people who already host their own things. CHAT - Live token streaming. Watch the agent's reply appear as it's generated. - Transparent tool calls. See the agent reach into your shell, files, or the web - with each tool's name and arguments shown as a card. - Multimodal. Attach images from the photo library and send them with your prompt. - Slash commands. Trigger agent-side commands from a clean, keyboard-friendly composer. VOICE MODE - Hands-free conversation. Dictate prompts and hear the reply spoken back. - On-device transcription. Your voice is transcribed locally; the text is what gets sent to your agent. - Bring-your-own TTS. If your Hermes backend streams text-to-speech, you hear the agent in a neural voice; otherwise it falls back to iOS voices. SESSIONS - Server-side history. Every conversation lives on your own Hermes server, not ours. - Searchable, renameable, pinnable. Find the thread you need, give it a name, keep it on top. - Local cache. Scroll the transcript even when you're offline. MULTIPLE BACKENDS - Run more than one Hermes instance? Add them all. Switch active with one tap. - Pair a second device by scanning a QR code. Credentials never cross our servers - we don't have any. - Each backend gets its own identity colour so you always know which agent you're talking to. DEMO MODE - Not running Hermes yet? Try the demo. A scripted preview shows how the real client behaves, without any setup. No account, no network, no obligation. PRIVACY-FIRST BY DESIGN - All credentials live in iOS Keychain. Face ID required before revealing or sharing them. - No analytics. No third-party SDKs. No telemetry. - The Abyss only talks to the backends you point it at. Apple processes any future purchases; that's the only third party in the loop. - App data flows between your device and your own Hermes backend. Nothing else. REQUIREMENTS - A running Hermes Agent on a machine you control. - Network reachability to that machine. Same Wi-Fi works; Tailscale (or another mesh) is recommended if you want to reach the agent from anywhere. The Abyss is not a hosted AI service. It is a remote control for an AI agent you host yourself.

Screenshots

MarkMind4 screens
The Abyss4 screens

Verdict

The call

The clearest difference is in-app purchases: The Abyss at none against MarkMind's 2. The Abyss also leads on update cadence (every 5 days vs fortnightly). MarkMind's advantage is iOS requirement (18.0 vs 26.5). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. MarkMind sells 2 in-app purchases, starting at $3.99 per month. The Abyss asks for nothing beyond the download.

UpkeepUpdate frequency

MarkMind ships an update fortnightly, The Abyss every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard3 real differences Β· 3 level
MarkMind versus The Abyss: the parameters behind the verdict, then further details
ParameterMarkMindThe Abyss
PriceFreeFree
Update frequencyFortnightlyEvery 5 days β€” better
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPad β€” betteriPhone
Requires iOS18.0 β€” better26.5
Further details β€” not scored
Size386 MB11 MB
Age rating4+4+
DeveloperCHING LOK CHENVladimir Adamovic

In-app purchases

2 purchases

MarkMind

Subscriptions1
  • Premium Member$3.991 Month
One-time1
  • 50 Coin$1.99
None

The Abyss

No in-app purchases

Questions

Is MarkMind free?
MarkMind is free to download, with in-app purchases available.
Is The Abyss free?
The Abyss is free to download, with no in-app purchases.
Do MarkMind or The Abyss have ads?
Neither MarkMind nor The Abyss shows ads.
Which is updated more often, MarkMind or The Abyss?
MarkMind ships an update fortnightly, and The Abyss every 5 days. Most recently, MarkMind was updated on October 24, 2026 and The Abyss on October 25, 2026.

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