Comparison

Graph Theory Book vs Irk Bitig

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

Head to head
About

Graph Theory Book

Access and read all eBook editions of a comprehensive graph theory textbook. Enjoy high-quality, searchable PDFs with active cross-references. An optional upgrade allows for PDF annotations.

Highlights
  • Downloadable eBook editions
  • Multiple language support
  • Searchable PDF format
  • Active cross-references
  • Optional PDF annotation upgrade
  • Read-only eBook
Features
Read full description

This app can download and display all the eBook editions of the Springer Graduate Text 173, Graph Theory, by Reinhard Diestel. The book is currently available in English, German, Chinese, Japanese and Russian. On iPhones, all books can be downloaded for free. On iPads, the purchase of any edition in a given language entitles you to free downloads of all other editions - past, present and future - in that language. Each eBook comes in high-quality searchable PDF; the same that was used to produce the corresponding print edition. The cross-references in the text and in the margins of the English and the German editions are active links: click on the "3.1" in a reference to Lemma 3.1 to be taken to that lemma. The eBook itself is read-only. There is a "Pro" upgrade available from within each book that allows for the usual PDF annotations, including resizable pencil comments. A Professional edition of the book, which can be annotated and printed, is available from the author's website for the book; see http://diestel-graph-theory.com/professional.html Publisher's blurb: This standard textbook of modern graph theory combines the authority of a classic with the engaging freshness of style that is the hallmark of active mathematics. It covers the core material of the subject with concise yet reliably complete proofs, while offering glimpses of more advanced methods in each field by one or two deeper results, again with proofs given in full detail. The book can be used as a reliable text for an introductory course, as a graduate text, and for self-study. From the reviews: "This outstanding book cannot be substituted with any other book on the present textbook market. It has every chance of becoming the standard textbook for graph theory." Acta Scientiarum Mathematiciarum "Deep, clear, wonderful. This is a serious book about the heart of graph theory. It has depth and integrity." Persi Diaconis & Ron Graham, SIAM Review "The book has received a very enthusiastic reception, which it amply deserves. A masterly elucidation of modern graph theory." Bulletin of the Institute of Combinatorics and its Applications "Succeeds dramatically ... a hell of a good book." MAA Reviews "A highlight of the book is what is by far the best account in print of the Seymour-Robertson theory of graph minors." Mathematika "... like listening to someone explain mathematics." Bulletin of the AMS App written by Alfred Cots Via (www.symphonicapps.com)

About

Irk Bitig

Explore an ancient book of omens written in Old Turkic. Discover your fortune by rolling dice, study original texts with transliterations and translations, and track your history and statistics. Support development through optional donations.

Highlights
  • Ancient Turkic book of omens
  • Fortune telling via dice roll
  • Original script, transliteration, and translation
  • History and statistics tracking
  • Digital book with original images
  • Customizable text display
Features
Read full description

Irk Bitig is a book of omens, written in Old Turkic language. This is an original piece of history, that is considered as one of the key examples and sources of the Turkic Mythology. "Irk" means "omen", and "Bitig" means "book" in Old Turkic language. If you would like to re-live the old times, and read your fortune like the ancient Turks did, just roll the dice, and face your destiny. You can also share the result on social media or send it to another friend. Just use the "Share" menu after rolling the dice. Use the tag #irkbitig to share your omen on Twitter! It is also possible to see your latest results omens via the "History" menu, and all your good/bad stats so far are available through the "Statistics" menu option. In addition, you can also study the omens, see them in their original writing, transliteration, and translation. This application features the whole Irk Bitig in digital form, all the omens are available in Old Turkic script, and the original book images are included for reference. You can view the text in its original font, or in a modern sans-serif typeface variant. I am actively developing this application, and many interesting features such as watchOS and macOS support, Siri integration, and a full dictionary will be added in the future. If you encounter any errors, or if you have feature requests, feel free to contact me anytime! If you would like to learn Old Turkic via studying Irk Bitig, and support development of this app, please consider purchasing the reference section of the omens. First three omens are included free-of-charge. This application is free to download, it is ad-free, and always will be. You can use it without the disturbances of unwanted advertisement. To show your support and appreciation, please consider tipping through the app.

Screenshots

Graph Theory Book4 screens
Irk Bitig3 screens

Verdict

The call

The clearest difference is review sentiment: Irk Bitig at 75% against Graph Theory Book's 0%. Graph Theory Book's advantage is rating (5.0 vs 2.5) and iOS requirement (13.1 vs 18.0). On price, ratings volume, update cadence and ads 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. Graph Theory Book sells 11 one-off in-app purchases and Irk Bitig sells 5 in-app purchases, starting at $1.49 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Graph Theory Book holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews complicate that: 0% of Graph Theory Book's written reviews are positive against 75% of Irk Bitig's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Graph Theory Book versus Irk Bitig: the parameters behind the verdict, then further details
ParameterGraph Theory BookIrk Bitig
PriceFreeFree
Rating5.0 (5 ratings) — better2.5 (2 ratings)
Positive reviews0.0% of reviews75.0% of reviews — better
Number of ratings5 — better2
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.1 — better18.0
Further details — not scored
Size7 MB48 MB
Age rating4+12+
DeveloperReinhard DiestelEmir Sari

Customer experience

Graph Theory Book

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Irk Bitig

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews4 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

In-app purchases

11 purchases

Graph Theory Book

One-time11
  • 1. The Basics$0.99
  • 2. Matching, Covering, and Packing$0.99
  • 3. Connectivity$0.99
Show 8 more
  • 6. Flows$0.99
  • 9. Ramsey Theory for Graphs$0.99
  • 11. Random Graphs$0.99
  • 12. Minors Trees and WQO$0.99
  • Hints for all the Exercises$9.99
  • Graph Theory$12.99
  • 图论$14.99
  • English stand-alone pro edition$32.99
5 purchases

Irk Bitig

Subscriptions1
  • Monthly Donation$1.491 Month
One-time4
  • Buy an Amulet$0.99
  • Unlock Omens$1.99
  • Buy Kumys$1.99
Show 1 more
  • Buy Pizza$3.99

Questions

Is Graph Theory Book free?
Graph Theory Book is free to download, with in-app purchases available.
Is Irk Bitig free?
Irk Bitig is free to download, with in-app purchases available.
Which has better reviews, Graph Theory Book or Irk Bitig?
Graph Theory Book is rated higher. Graph Theory Book averages 5.0 out of 5 from 5 ratings, while Irk Bitig averages 2.5 from 2 ratings.
Do Graph Theory Book or Irk Bitig have ads?
Neither Graph Theory Book nor Irk Bitig shows ads.
Which is updated more often, Graph Theory Book or Irk Bitig?
Graph Theory Book ships an update every 2 months, and Irk Bitig every 2 months. Most recently, Graph Theory Book was updated on October 23, 2026 and Irk Bitig on October 24, 2026.

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