Library Calculator vs Reading Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Library Calculator
This app helps you manage your reading goals by calculating the daily pages needed to finish a book by its due date. Easily input your current progress and the book's total pages to get a clear reading schedule.
- Daily page calculation for due dates
- Update current page number
- Recalculate daily reading count
- Simple and quick interface
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Library Calculator makes it easy to keep track of how many pages you need to read per day to finish your book by its due date. Enter your current page number, the total number of pages, & the due date. Library Calculator will display the number of pages you need to read each day leading up to your due date to finish your book on time. Features: • Quick and simple page calculation for upcoming due dates. • Update Page Numbers: Allows you to change your current page number to recalculate your daily count.
Reading Timer
Track your reading time and pages with a quick timer. Organize your personal library, view detailed reading statistics, and stay motivated with a visual reading heatmap.
- Quick reading timer
- Page tracking
- Personal library management
- Reading statistics and reports
- Reading heatmap for streaks
- Track reading pace
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How much did you read today? Keep the time, pages, and thoughts together. Reading Timer is a reading log and book tracker for the books you already own. Start the timer, read at your own pace, then enter your ending page. Your session becomes part of your book diary, with time, pages read, and reading speed in one place. KEEP A READING JOURNAL Save a thought after each session, add notes to a book, and revisit what you read. Forgot the timer? Add a reading record manually. SEE YOUR BOOKS MOVE FORWARD Keep current reads and completed books on your bookshelf. Track page progress and view each book’s sessions, average pace, and estimated completion based on your recorded reading. BUILD A READING HABIT YOU CAN SEE Choose a time or page goal for the day, week, month, or year. Check your reading calendar, activity heatmap, and statistics. Optional daily time-goal alerts let you know when you reach that goal while reading. ADD BOOKS YOUR WAY Enter a title and author, or look up book information by ISBN barcode. Check the details before saving; information may be incomplete. Export books and sessions as CSV for use in a spreadsheet. READ AT YOUR OWN PACE Use dark mode or keep the screen awake while timing. Join the optional weekly ranking or share a reading record if you choose. Reading Timer tracks your reading. It does not provide ebooks. OPTIONAL PRO SUBSCRIPTION Reading Timer Pro is a 1-month auto-renewable subscription that removes all ads while active. The price is shown before purchase and may vary by store. Manage or cancel your subscription in your store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://hydroponicglass.com/privacy-policy/
Screenshots
Verdict
The clearest difference is ads: Library Calculator at none against Reading Timer's shown. Reading Timer's advantage is ratings volume (21 vs 1) and update cadence (every 2 weeks vs monthly). On price, rating, 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. Library Calculator sells 1 one-off in-app purchase and Reading Timer sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Library Calculator against 4.9 for Reading Timer. That said, the two scores are not equally well evidenced: Reading Timer has 21 ratings behind it against 1, so its average is the more settled of the two.
Library Calculator ships an update monthly, Reading Timer every 2 weeks. The most recent releases landed on October 28, 2026 and October 30, 2026 respectively.
| Parameter | Library Calculator | Reading Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.9 (21 ratings) |
| Positive reviews | — | 88.9% of reviews |
| Number of ratings | 1 | 21 — better |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 81 MB |
| Age rating | 4+ | 4+ |
| Developer | Logan Voss | Seulki Eom |
Customer experience
Library Calculator
Reading Timer
In-app purchases
Library Calculator
- Reading Notifications$0.99
Reading Timer
- Reading Timer Pro$1.991 Month
Questions
Is Library Calculator free?
Is Reading Timer free?
Which has better reviews, Library Calculator or Reading Timer?
Do Library Calculator or Reading Timer have ads?
Which is updated more often, Library Calculator or Reading Timer?
Other comparisons
