MonoMind vs OpenViewer
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
MonoMind
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No matter how many tasks you have, you can only do one thing right now. Let MonoMind help you with that one thing. While we crave constant stimulation, we still find peace in watching flames or flowing water.Β Observing gradual changes helps clear our minds and brings calmness. Our daily lives need slow changes, just like MonoMind's numberless clock. MonoMind helps you focus on just one task at a time.Β The screen shows only your current task and a numberless clock. Don't worry about what's next.Β When you finish your current task, MonoMind automatically brings up the next one from your list. - Tap the clock to check remaining time - Long press the clock to end session - Tap next task to complete current and start next - Plan your breaks by writing what you'll do - View your focus and break history in statistics
OpenViewer
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OpenViewer is a lightweight viewer for all standard document formats. [Supported formats] PDF Β· HWP Β· DOCX Β· XLSX Β· PPTX Β· EPUB Β· TXT Β· Images [Key features] β’ Fast launch β’ Dark mode β’ Recent files + favorites β’ 100% on-device processing β’ Native HWP support for Korean documents [Why OpenViewer?] - No in-app purchases - No account required - Ad-supported (no ads inside viewer) - English, Korean, Japanese UI Contact: wowpia0127@gmail.com
Screenshots
Verdict
The clearest difference is ads: MonoMind at none against OpenViewer's shown. MonoMind also leads on update cadence (every 5 days vs every 2 months). OpenViewer's advantage is iOS requirement (15.1 vs 17.2). On price, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MonoMind ships an update every 5 days, OpenViewer every 2 months. The most recent releases landed on December 4, 2025 and September 15, 2026 respectively.
| Parameter | MonoMind | OpenViewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days β better | Every 2 months |
| Ads | No β better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 17.2 | 15.1 β better |
| Further details β not scored | ||
| Size | 13 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Heung Ju Ha | BongJun Park |
In-app purchases
MonoMind
No in-app purchases
OpenViewer
No in-app purchases
