CalReader vs Timestamp Marker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalReader
Enhance your calendar's readability with customizable fonts and sizes. Easily filter events by date, calendar, or search terms, and export your data and time calculations in various formats like TEXT, CSV, or TSV. This tool is ideal for logging work or personal events and generating invoices.
- Customizable font and size
- Event filtering by date, calendar, and text
- TEXT, CSV, TSV export
- Time calculation for billing
- Siri Shortcuts integration
- Dark Mode support
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CalReader provides calendar readability, TEXT/CSV/TSV export, and time calculations. Choose a favorite font and size for maximum readability. Filter event listings by date range, calendar, and search text, and export listings and time calculations at TEXT, CSV, or TSV files. CalReader features time analysis and can calculate an invoice billing amount and time log for a given filter setup, total hours and rate per hour. Use Siri Shortcuts and Home Screen Quick Actions to quickly perform common actions in CalReader. CalReader can be used to log events on work/home projects. CalReader integrates iOS, macOS and CalDAV calendars including macOS Server, Google and Yahoo calendars, and provides a unique tool for journals, diaries and event logs. CalReader's unique flexibility makes for easy browsing/reading of one's history or future. The events listing view optionally displays ALL of the text of an event in an easy to read format. Calendar Filtering • Choose a date range to filter the visible events and to calculate hours and produce time logs. • Easily choose a single calendar, multiple calendars or all calendars for viewing. • Search selected calendars for text, keywords or phrases. • The search function can be used to search for times or dates. For example, find all events in the date range that start at "9:00 AM", or events on the date "11/4/26". Export Listings and Calculations • The export text generated by the Copy Text With Calculations command includes a header with the current calendar names, date range and optional search text. • Copy the filtered calendar text, with or without calculations, and then paste the text to other types of applications, or tap E-Mail Text to deliver the calendar text via e-mail. • E-mail CSV (Comma-Separated Values) or TSV (Tab-Separated Values) event listing files as attachments. • The Calculations view displays the total hours for the filtered event set and calculates the total amount using rate per hour, useful for invoices / billing. Calculations also displays the event count, average, minimum and maximum duration for the current set of events. Display Customization • Dark Mode support, and app-based dark and light styles with various color effects and calendar color indications. • Customize the font and size of the calendar text for best readability: large text is easy on the eyes, or small text for high density information. • Use pinch touch gestures to instantly change the size of the text. • Choose from various view styles using calendar colors, or no colors. • Choose to view all text of each item, or limit the number of lines (1-5) for a quick overview. Usability • Week and Month select: Previous, This, Next buttons provide fast one-tap date range selections. Use Previous and Next buttons repeatedly to move the date range window through time. • Go To Today and Go To Date actions provide quick navigation. • Speak Events uses the device’s text-to-speech capabilities to speak the currently visible events. • The Filter settings, Actions, Display, Calculations and Extras sections are neatly accessible without scrolling and searching for functions. • Tap the Done button for direct return to the main CalReader view after performing functions or settings changes. • Event listings include the duration for each event. • Events close to the current time are highlighted in the listing view with a gradient of orange displayed along the right edge, most intense for events close to the current time, fading off for events within 24 hours before and after the current time. • The filter settings of CalReader help produce complete listings of events that match a date range, calendar set, and a text phrase, and readability all of the text in the filtered set of events. • Choose to see all of the event text for all displayed events in the list, or truncated text and more items per screen. • Update Notification sound indicates a calendar update.
Timestamp Marker
Instantly create and edit time markers with a single tap. Add events with or without titles, and view time elapsed since your last recorded event. Calculate time differences between selected markers, including future timestamps.
- Instant timestamp creation
- Editable event titles and times
- View time since last event
- Calculate time between markers
- Support for future timestamps
- Batch deletion of events
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Create timestamps instantly, no need to stop and write. Add markers with a single tap, then edit anytime. • Add events with or without a title (default: “Marker”) • Edit time and title at any time, including setting future times • Main screen shows time since your most recent past event “Show Time Pass” (from markers list menu): No selection: time from now to latest past event • One selected: time between now and that event (past or future) • Two selected: time between both events Future timestamps are only included when explicitly selected. Time differences are always shown as absolute values. • Remove multiple events using “Delete Before”
Screenshots
Verdict
The clearest difference is review sentiment: Timestamp Marker at 100% against CalReader's 33%. Timestamp Marker also leads on price (Free vs $6.99) and update cadence (every 6 weeks vs every 4 months). CalReader's advantage is rating (4.3 vs 4.0) and ratings volume (3 vs 1). On 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
Timestamp Marker is free to download; CalReader costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CalReader holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews complicate that: 33% of CalReader's written reviews are positive against 100% of Timestamp Marker's, so the app with the better star average is not the one people write more warmly about.
CalReader ships an update every 4 months, Timestamp Marker every 6 weeks. Both last shipped on August 29, 2026.
| Parameter | CalReader | Timestamp Marker |
|---|---|---|
| Price | $6.99 | Free — better |
| Rating | 4.3 (3 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 16 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Imaja | Rod Bauer |
Customer experience
CalReader
Timestamp Marker
In-app purchases
CalReader
No in-app purchases
Timestamp Marker
No in-app purchases









