Comparison

BookJack Player vs Nana's Focus

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

BookJack Player

This app provides a clean and powerful way to listen to your personal audiobook collection. Import your M4B, M4A, MP3, or FLAC files and enjoy features like adjustable playback speed, smart controls, and a sleep timer.

Highlights
  • Import personal audiobook files (M4B, M4A, MP3, FLAC)
  • Custom folders and search functionality
  • Adjustable playback speed (0.5x - 3.0x)
  • Smart rewind and skip controls
  • Sleep timer
  • Chapter navigation and bookmarks
  • Dark and Light Mode
Features
Read full description

Ever wish you had more time? While listening to Start With Why by Simon Sinek, I realized our why: audiobooks give you time back. BookJack was built for your library, so you can listen anywhere... on your commute, at the gym, or even as you fall asleep. It’s the clean, no-nonsense player that makes audiobooks feel like a third arm in your life. Import. Play. Repeat. Drop in your M4B, M4A, MP3, or FLAC files and get listening. Developed by Brett & Dane Library • Import your own files or whole folders • Custom folders & search by title/author • Sort by title, author, date, or progress Playback • Adjustable speed (0.5x – 3.0x) • Smart rewind & skip controls • Volume boost + sleep timer • Chapter navigation & bookmarks Experience • Dark & Light Mode • Custom accent colors • Mini player & full-screen player • Clean, modern SwiftUI design Why BookJack? BookJack is designed for audiobook enthusiasts who want a simple, powerful, and beautiful way to manage and enjoy their own digital library. Built with SwiftUI and SwiftData, it delivers fast performance, a modern design, and a truly native iOS experience. Supported formats: M4B, M4A, MP3, FLAC

About

Nana's Focus

This app helps you study your own texts with multiple reading modes and spaced repetition flashcards. It includes guided breathing exercises and optional background noise to aid focus. Track your study progress and learn effective study techniques.

Highlights
  • Multiple reading modes (Spot, Line, Traditional)
  • Spaced repetition flashcards from highlights
  • Guided breathing exercises
  • Optional steady pink noise generator
  • Study progress tracking
  • Nine 'How to study' lessons
  • Supports various file formats (PDF, EPUB, DOCX, etc.)
Features
Read full description

Nana's Focus is a reader for studying from your own texts. It does not promise you will read three times faster, because that would not be true. It looks after something plainer. Three pages in, you should still have the first one. Three ways to read, because different things slip away from different people. Spot: words arrive one at a time, in one place on the screen. Your eyes stop wandering, because there's nowhere to wander to. Line: the whole sentence in front of you, with a pointer leading your eye underneath. Traditional reading: a plain page at your own pace. This is where you drag your finger over what you need to know. A breath before reading. In through the nose, a short sip more on top, then a long breath out through the mouth. The out-breath has to be longer than both in-breaths together, because the whole thing rests on that proportion. One minute, three or five, and you can turn it off. Noise in the background, if it happens to help you. Steady pink noise, generated as it plays, so your ear never catches a loop. Here is the honest version of where this stands: in a 2024 pooling of thirteen studies, steady noise improved performance for people with ADHD and made it worse for people without. The gain was small, and it varied a lot between individuals. Turn it on for one session and see for yourself. Highlights become cards. Drag your finger across a sentence and pick what it is: a definition, a date, a key point, or "I don't get it". The app writes questions from the first three. From the last one it writes nothing, because there's no point cramming what you don't understand. Cards come back to fit the date. Give the app your exam date and it spreads the reviews so the last round lands before the exam, not after it. The closer the date, the more often the questions come back. The Study tab works out how much you have to read each day to get through the material in time. It leaves the final days for reviews alone, because a chapter read once isn't enough. Nine lessons called "How to study". Active recall, spaced repetition, desirable difficulty, prequestions and more. Each lesson says how much evidence stands behind it, and where the evidence is thin it says so. Six ways to remember. For the things that have to come back word for word, or in order. None of them will help you understand a text, and the first screen says so before you start. At the end of every sitting, one question: what stayed with you, in one sentence, out of your own head. That is how remembering works. Read your own: PDF, EPUB, FB2, MOBI, DOCX, txt, or text you paste in. That is what this app is for. One short text is waiting on the shelf to start with, "Evening in the building", the same passage you read during the reading test, so the shelf isn't empty on the first day. No account in the app, and no sign-in. Your texts, highlights, cards and progress stay on your phone, because there's no server for them to go to. What this app doesn't do: it doesn't speed your reading up and it doesn't claim to switch off the voice in your head. The popular advice about silencing that voice isn't backed by the research, and the app says so plainly. Trial and purchase You turn on seven days of the full version whenever you like, with no card and no account. Until then, the free version works. After that it's one purchase, once and for good: 29.00 USD. No subscription. The purchase unlocks the whole app. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://nanas.pro/legal/privacy

Screenshots

BookJack Player4 screens
Nana's Focus4 screens

Verdict

The call

The clearest difference is review sentiment: Nana's Focus at 100% against BookJack Player's 0%. Nana's Focus also leads on rating (5.0 vs 2.0) and update cadence (weekly vs every 6 months). BookJack Player's advantage is in-app purchases (none vs 2). On price, ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Nana's Focus sells 2 in-app purchases, starting at $3.99 per month. BookJack Player asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Nana's Focus holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 0% of BookJack Player's written reviews are positive against 100% of Nana's Focus's.

UpkeepUpdate frequency

BookJack Player ships an update every 6 months, Nana's Focus weekly. The most recent releases landed on September 19, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
BookJack Player versus Nana's Focus: the parameters behind the verdict, then further details
ParameterBookJack PlayerNana's Focus
PriceFreeFree
Rating2.0 (2 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings2 — better1
Update frequencyEvery 6 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.518.0 — better
Further details — not scored
Size92 MB24 MB
Age rating4+4+
DeveloperBrett RidenourAdrian Skobiej

Customer experience

BookJack Player

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Nana's Focus

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

BookJack Player

No in-app purchases

2 purchases

Nana's Focus

Subscriptions1
  • Monthly access$3.991 Month
One-time1
  • Full access, for good$29.00

Questions

Is BookJack Player free?
BookJack Player is free to download, with no in-app purchases.
Is Nana's Focus free?
Nana's Focus is free to download, with in-app purchases available.
Which has better reviews, BookJack Player or Nana's Focus?
Nana's Focus is rated higher. BookJack Player averages 2.0 out of 5 from 2 ratings, while Nana's Focus averages 5.0 from 1 ratings.
Do BookJack Player or Nana's Focus have ads?
Neither BookJack Player nor Nana's Focus shows ads.
Which is updated more often, BookJack Player or Nana's Focus?
BookJack Player ships an update every 6 months, and Nana's Focus weekly. Most recently, BookJack Player was updated on September 19, 2026 and Nana's Focus on October 13, 2026.

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