Comparison

Yi Jing vs Selene Moon Cycle

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

Head to head
About

Yi Jing

This app provides an ancient oracle experience on your modern device. It helps you navigate life's challenges by offering a journal, multiple book translations, and various methods for casting coins or manipulating yarrow stalks to receive guidance.

Highlights
  • Ask questions using coin toss or yarrow stalks
  • Manage a detailed journal with notes and search
  • Browse multiple I Ching book translations
  • Access original Chinese and other language texts
  • Includes artwork and specialized casting methods
Features
Currently charting
Read full description

Ancient oracle meets modern device! Deal with life's challenges more meaningfully. Tap into your inner self. Find the translation that speaks to you. Ask questions, use the oracle, manage a journal, and browse multiple book translations. Ask questions... * Specify a topic * Enter a question or phrase * Toss coins by shaking * Or manipulate yarrow stalks * Or toss dice * Or use Stephen Karcher's Circle of Protectors * Or navigate Michael Tingle's I Ching Mandala * Or use the Quick option * Or use manual input Manage a journal... * Multi-line questions & notes * Sort by topic, hexagram or date * Search by keyword * Present, Changes and Future * Add your own notes * Switch translations for readings * Mail journal entries Browse the book... * Multiple book translations * Chinese with Pinyin phonetics * King Wen Hexagram numbers * Trigram descriptions * Component Trigrams * Ruling Lines * Related Hexagrams English translations... * A Library tab makes it easy to switch books * "Yi Jing - Book of Transformations" by Brian Arnold, featuring artwork by Elizabeth Nelson * "A Guide to the I Ching" by Carol K. Anthony (English and German) * "Yi Jing / Book of Changes" by Gregory C. Richter * "I Ching Oracle" by Nigel Richmond Other translations... * "Language of the Lines", English (Nigel Richmond) * Original Chinese (two versions) * "I Ging", German (Wilhelm) * "Yi Jing", Japanese (Yo Fujiwara) * "Yi Jing", in French, Spanish, Dutch, Portuguese, Italian, Russian (Arnold) More books for in-app purchase... * "The I Ching or Book of Changes" (Book I, II and III) by Richard Wilhelm * "The Laws of Change" by Jack Balkin * "The Complete I Ching" by Taoist Master Alfred Huang Other key features... * Straightforward and elegant interface * Option to represent coin heads as Yang * Option to cast coins using Yarrow stalk probabilities * Portrait and landscape orientation * Resources to access help and online I Ching resources

About

Selene Moon Cycle

Features
Read full description

Selene is a daily guide that combines your menstrual cycle with the rhythm of the moon. Every day, Selene shows you where you are in your own cycle and what that phase brings — physically, emotionally, and energetically. At the same time, it tracks the current moon phase, from the intentions of the New Moon to the release of the Full Moon. These two cycles have always moved together. Selene helps you read them both. WHAT SELENE SHOWS YOU EACH DAY · Your current cycle phase — menstruation, follicular, ovulation, or luteal · What that phase means for your energy, mood, and body · The current moon phase and its emotional tone · Themes and intentions for each phase of the lunar cycle · Moon in Sign (optional unlock): which zodiac sign the moon is in, how it affects your energy, and what it means for your exact cycle phase MOON IN SIGN The moon moves through a new zodiac sign every two to three days — and it changes the quality of everything. Moon in Sign is a one-time unlock that gives you daily insight into which sign the moon is in and how it connects to where you are in your cycle. No subscription. Yours forever. DESIGNED FOR WOMEN WHO WANT TO UNDERSTAND THEIR RHYTHM Selene does not tell you what to do. It reflects what is already happening — in your body, in the sky — and lets you make sense of it yourself. Minimal, quiet, and personal. · No account required · No subscription for the core app · Cycle tracking stays on your device **Your cycle, your four phases:** Menstruation, Follicular, Ovulation and Luteal — each with its own energy, archetype and guidance for the day. **Moon phase guidance:** Eight lunar phases explained in plain language. Know when to start, when to push and when to rest. **Cycle and moon alignment:** Selene shows how your personal cycle relates to the current moon phase — the White Moon cycle, the Red Moon cycle and everything in between. **Completely private:** Everything stays on your device. No gathering of data.

Screenshots

Yi Jing4 screens
Selene Moon Cycle4 screens

Verdict

The call

The clearest difference is price: Selene Moon Cycle at Free against Yi Jing's $4.99. Selene Moon Cycle also leads on update cadence (every 10 days vs every 4 months). Yi Jing's advantage is chart position (#195 vs unranked) and device support (3 vs 1). On ads, in-app purchases and iOS requirement 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

Selene Moon Cycle is free to download; Yi Jing costs $4.99 up front. Yi Jing sells 10 one-off in-app purchases and Selene Moon Cycle sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Yi Jing ships an update every 4 months, Selene Moon Cycle every 10 days. The most recent releases landed on October 26, 2026 and October 7, 2026 respectively.

Scorecard4 real differences · 7 level
Yi Jing versus Selene Moon Cycle: the parameters behind the verdict, then further details
ParameterYi JingSelene Moon Cycle
Price$4.99Free — better
Rating4.9 (917 ratings) — better—
Positive reviews91.2% of reviews—
Number of ratings917 — better—
Update frequencyEvery 4 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
Best chart rank#195 — better—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better16.0
Further details — not scored
Size122 MB2 MB
Age rating4+4+
DeveloperFlat Earth Studio LLCHerman Paul Blok

Bugs and requests

Yi Jing

Reported bugs

3 issues
  • Crashes on launch or shortly after
  • Typing issues (text disappearing)
  • Syncing problems between devices

Requested features

4 requests
  • Add more I Ching text translations
  • Improve syncing and cross-device support
  • Implement password protection for journal entries
  • Optimize performance and stability

Selene Moon Cycle

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Yi Jing

One-time10
  • I Ging: Das Buch der Wandlungen$2.99
  • I Ching (Hurn)$4.99
  • The I Ching: Book I (Wilhelm)$4.99
Show 7 more
  • The I Ching II: The Material$4.99
  • The I Ching III: Commentaries$4.99
  • The I Ching Workbook (RL Wing)$6.99
  • I Ching (Barrett)$6.99
  • Navigating Change (Karcher)$8.99
  • The Complete I Ching (Huang)$9.99
  • The Laws of Change (Balkin)$9.99
1 purchases

Selene Moon Cycle

One-time1
  • Moon in Sign$2.99

Questions

Is Yi Jing free?
Yi Jing costs $4.99, and also offers in-app purchases.
Is Selene Moon Cycle free?
Selene Moon Cycle is free to download, with in-app purchases available.
Do Yi Jing or Selene Moon Cycle have ads?
Neither Yi Jing nor Selene Moon Cycle shows ads.
Which is updated more often, Yi Jing or Selene Moon Cycle?
Yi Jing ships an update every 4 months, and Selene Moon Cycle every 10 days. Most recently, Yi Jing was updated on October 26, 2026 and Selene Moon Cycle on October 7, 2026.

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