52
BU Score
Solid
The Spirit's Book (Kardec)
✍️ bumetric analysis
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The Spirit's Book (Kardec) is an iOS app from F&E System Apps in the Food & Drink category, currently rated 5.0★ across 3 ratings. Initial signal reads as no scraped reviews yet: judgment based on metadata only.
Our BU Score puts it at 52: Solid (established niche player). For a Food & Drink app, that means established niche player.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
📊 Performance Tracking LIVE
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Rating
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Reviews
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Forecast Revenue / mo
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Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| Excellent rating (5.0★)METRIC | +$2,200 | |
| Mature app (15y old)METRIC | +$1,500 | |
| Pre-traction phase (3 ratings)METRIC | −$300 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
App Specs
🔐 Own this app? Claim & verify MRR →💾 5 MB🔞 4+📱 iOS 15+🔖 v5.2🔄 updated 4w ago🌐 EN, PT, ES📂 Food & Drink💰 Paid🚀 Launched 2010 (15y old)
📝 About this app
Spreading the Spirit ...
The Spirits' Book (Le Livre des Esprits in original French) is part of the Spiritist Codification, and is regarded as one of the five fundamental works of Spiritism. It was published by the French educator Allan Kardec on April 18, 1857. It was the first and remains the most important spiritist book, because it addresses in first hand all questions developed subsequently by Allan Kardec.
The book is structured as a collection of questions regarding the origin of the spirits, the purpose of the life, the order of the universe, evil and good and the afterlife.… View full description on the official store →
The Spirits' Book (Le Livre des Esprits in original French) is part of the Spiritist Codification, and is regarded as one of the five fundamental works of Spiritism. It was published by the French educator Allan Kardec on April 18, 1857. It was the first and remains the most important spiritist book, because it addresses in first hand all questions developed subsequently by Allan Kardec.
The book is structured as a collection of questions regarding the origin of the spirits, the purpose of the life, the order of the universe, evil and good and the afterlife.… View full description on the official store →
🆕 What's New · v5.2
Improvements and adaptations for the latest iOS version.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- The Spirit's Book (Kardec)
- Developer
- F&E System Apps
- Bundle ID
- LEING
- App Store URL
- Open in App Store
- Category
- Food & Drink
- Content rating
- 4+
- Languages
- EN, PT, ES
Company
- Website
- apps.fesystemapps.com
- Tagline
- Not found
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $86/mo
- Top-grossing rank
- Outside top 100 in US Food & Drink
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- Not found
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- Not found
📈Ratings growth3 ratingsShow 3-year history estimate ▾
Tracked (1 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
Full revenue analysis
Read the article-style breakdown for The Spirit's Book (Kardec): category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.