Bookends vs Interval Timer for Tasks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bookends
Manage your research references and PDFs on your mobile device. Search online databases, import metadata, annotate PDFs, and organize your library. Offers basic functionality for free with optional one-time purchase and yearly subscription for advanced features like cloud sync and unlimited imports.
- Search online reference databases
- Import metadata and PDFs
- PDF annotation and markup
- Barcode scanning for references
- Cloud sync across devices
- Share online libraries
- Create multiple libraries
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Bookends is the reference management app you've been looking for. The basic version offers: • Search online sites directly (arXiv, Google Books, Google Scholar, JSTOR, the Library of Congress, PubMed, PubMed Central, and Semantic Scholar) or use the built-in browser (EZProxy-compliant) to download reference metadata and PDFs (access privileges required). Searches can return a maximum of 20 references, and only 50 references can be stored in your personal database. • Use unique identifiers such as DOI, PMID, ISBN, or arXiv id to autofill references. • View the text of PDF annotations in a note stream, and create your own with our powerful PDF markup engine. • Barcode scanning, one per day. • And many more features designed to help you discover, organize, and use reference information. Standard, one-time purchase ($14.99): • No limit on searches or importing. Premium, yearly subscription ($14.99). Requires a Standard purchase. • Cloud sync with all your iOS devices and Bookends for Mac (separate purchase). • Share online libraries with colleagues. • Scan documents with Mellel Mobile*. • Create multiple libraries. • Unlimited barcode scanning. • Extract PDF annotations with deep links to annotations and text. • Convenient UI to add PDF notes to the library. • Automate your actions with Shortcuts. * iPad-only. Requires a Mellel Mobile Premium subscription. Subscription is for one year and has an auto-renew option. The subscription can be managed in iOS -> Settings > [your name] > Subscriptions. A subscription will renew if it isn't canceled at least 24 hours before the renewal date. If the subscription is not renewed, Premium will be disabled but Standard will continue to work. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Interval Timer for Tasks
Configure custom interval timers for focused work, study, or routines. Set multiple intervals with unique sounds and durations. Receive notifications even when the app is closed.
- Configure multiple intervals per timer
- Save and run multiple timers simultaneously
- Customizable interval names, sounds, and colors
- Start and finish delays
- Background notifications
- Siri and Shortcuts integration
- Standalone Apple Watch app
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Build a timer that walks through your routine, one named step at a time. Interval Timer for Tasks lets you chain intervals into a single timer. Give each interval its own name, duration, sound and colour, and the app calls out every step as it passes. Watch the progress ring wind down, or close the app and let a notification tell you when the current interval has ended. Save as many timers as you like, and run more than one at the same time. Add a start delay so you can get ready, and a finish delay so you can wrap up. LOCK SCREEN ALARMS Turn on Lock Screen Alarm for a timer and each interval rings like a system alarm, so it still reaches you when the screen is off. Requires iOS 26.1 or later. GREAT FOR - studying and focused work - the pomodoro technique - ADHD focus and timed work blocks - taking regular breaks during the day - stretching and mobility routines - breathing exercises - multi step routines and processes - cooking and recipes FEATURES - chain multiple named intervals into one timer - run several saved timers at the same time - Lock Screen Alarms on iOS 26.1 and later - a standalone Apple Watch app - Siri and Shortcuts support - local notifications while the app is in the background - a large choice of alert sounds, one per interval - a colour and a name for every interval - start delay to get ready, finish delay to wrap up - name and save your timers for next time Interval Timer Premium Subscription Upgrade to access all features Payment will be charged to your Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Bookends at 4.7 against Interval Timer for Tasks's 4.2. Bookends also leads on ads (none vs shown) and review sentiment (76% vs 43%). On price, update cadence, in-app purchases and monetization model 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. Bookends sells 2 in-app purchases, starting at $14.99 per year and Interval Timer for Tasks sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Bookends holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 398 and 95 respectively. Written reviews point the same way: 76% of Bookends's written reviews are positive against 43% of Interval Timer for Tasks's.
Bookends ships an update every 2 months, Interval Timer for Tasks monthly. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.
| Parameter | Bookends | Interval Timer for Tasks |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (398 ratings) — better | 4.2 (95 ratings) |
| Positive reviews | 76.4% of reviews — better | 42.9% of reviews |
| Number of ratings | 398 — better | 95 |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 18.6 | 18.0 — better |
| Further details — not scored | ||
| Size | 114 MB | 87 MB |
| Age rating | 4+ | 4+ |
| Developer | Sonny Software, LLC | Foobar Creative |
Customer experience
Bookends
Interval Timer for Tasks
Bugs and requests
Bookends
Reported bugs
3 issues- Incompatibility with iCloud Optimized Storage
- Unreliable sync between desktop and mobile versions
- Occasional data loss or corruption
Requested features
4 requests- Nested folders and tags for better organization
- Automatic PDF metadata extraction
- Improved search and filtering capabilities
- Seamless integration with third-party services
Interval Timer for Tasks
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Bookends
- Premium3 Months trial$14.991 Year
- Standard$14.99
Interval Timer for Tasks
- Interval Timer Premium Monthly$2.991 Month
- Interval Timer Premium Yearly7 Days trial$7.991 Year
- Pro Upgrade$19.99
Questions
Is Bookends free?
Is Interval Timer for Tasks free?
Which has better reviews, Bookends or Interval Timer for Tasks?
Do Bookends or Interval Timer for Tasks have ads?
Which is updated more often, Bookends or Interval Timer for Tasks?
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