# OpenTime vs Marklens

The clearest difference is price: Marklens at Free against OpenTime's $0.99. Marklens also leads on ratings volume (3 vs 1) and iOS requirement (18.0 vs 26.2). OpenTime's advantage is update cadence (every 2 days vs monthly). On rating, ads, in-app purchases and device support there is nothing between them.

Marklens is free to download; OpenTime costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for OpenTime against 5.0 for Marklens. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

OpenTime ships an update every 2 days, Marklens monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | OpenTime | Marklens |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/opentime/id6760204246/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/marklens-markdown-reader/id6775853573/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | Paid | **Free** |
| Size | 4 MB | 4 MB |
| Requires iOS | 26.2 | **18.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [james tannahill](https://appshunter.io/developer/1883186220) | [Donald Jackson](https://appshunter.io/developer/6775853575) |

## What reviewers say

### OpenTime

[App page](https://appshunter.io/ios/app/opentime/id6760204246)

Quickly find your open time slots by analyzing your device calendars. This app offers flexible date range views, slot duration selection, and convenient sharing options without requiring accounts or tracking your data.

**Highlights:** View free/busy slots for any date range, Slot duration picker with chip subdivision, Quick sharing of daily availability, Customizable appearance (light/dark/system), Pinned queries for one-tap access, Home screen widgets and Live Activities, Apple Watch companion app

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Marklens

[App page](https://appshunter.io/ios/app/marklens-markdown-reader/id6775853573)

This app is a fast, native Markdown viewer for macOS, iPadOS, and iPhone. It renders .md files instantly with beautiful typography, themes, syntax highlighting, and diagrams. Designed for reading, it offers a private and friction-free experience.

**Highlights:** Instant Markdown rendering, Syntax highlighting for 30+ languages, Mermaid diagram support, GitHub-Flavored Markdown, Light and dark themes, Export to PDF, Quick Look preview on macOS

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OpenTime free?

OpenTime costs $0.99, with no in-app purchases.

### Is Marklens free?

Marklens is free to download, with no in-app purchases.

### Which has better reviews, OpenTime or Marklens?

OpenTime and Marklens are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do OpenTime or Marklens have ads?

Neither OpenTime nor Marklens shows ads.

### Which is updated more often, OpenTime or Marklens?

OpenTime ships an update every 2 days, and Marklens monthly. Most recently, OpenTime was updated on October 24, 2026 and Marklens on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*