DaysyDay - Zykluskalender
45
Quality Score
Emerging
DaysyDay - Zykluskalender
Medium confidence
✍️ bumetric analysis
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DaysyDay - Zykluskalender is an iOS app from Valley Electronics in the Education category, currently rated 3.5★ across 102 ratings. Initial signal reads as mostly critical sentiment so far: users flag rough edges and unmet expectations.
Quality Score is 45: Emerging (early traction worth watching). For a Education app, that means early traction worth watching. The full BU Investment Matrix below scores 8 dimensions including monetisation, growth, and operational risk.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
💰 Monthly revenue · now vs forecast
● Right now
$5.0K
per month
→
12-mo forecast
$5.2K – $10.8K
per month
→
24-mo forecast
$6.4K – $19.2K
per month
MID tier
💡 Grow this revenue
Free AI audit of this app’s store listing
- Title & subtitle keyword fit
- Description hook & conversion structure
- Screenshots, ratings, reviews strategy
Typical impact: +2-5× organic installs
📊 Performance Tracking LIVE
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD
💰 Estimated build cost
$60K
↳ What it cost to build · not monthly revenue
Likely range $45K – $80K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Slow ROI — current MRR is well below build cost
Synthetic estimate. Inputs: category complexity, file size, screen count, monetization layer, platform reach, age × team-size proxy. Calibrated against 2024-2026 indie-agency rate surveys. Full math + source list on /methodology.
Where the money goes
| 🧱 MVP baseline (design + 1-store ship) | +$28K |
| 📱 5 unique screens × $4.5K | +$22K |
| ⚙ Education complexity ×1.20 | +$10K |
Total estimate
$60K
👥 Estimated audience size
8.6K
Lifetime downloads (US-equivalent)
Monthly active
1.5K
Daily active
450
Synthetic estimate from ratings × category benchmarks. Calibrated against 2024-2026 mobile-attribution retention + DAU/MAU reports. Numbers are US-storefront-equivalent — true global audience can be 5-10× larger for international apps. Full math + source list on /methodology.
How we sized it
| 📲 Education engagement | ~85 installs / rating |
| 🔁 Education D30 retention | 18% |
| 📍 DAU / MAU stickiness | 0.30 |
DAU / MAU
30% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$5.0K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$4.7K – $7.9K
12 months
$5.2K – $10.8K
24 months
$6.4K – $19.2K
Compound growth at +4.0% MoM (tier baseline for MID). Range widens with horizon — typical noise band ±25% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Stalled · 38/100MID TIERno growth momentumGrowth Velocity
5.0
Founder Strength
4.3
Product Quality
4.9
Revenue Strength
3.7
Monetization Maturity
1.0
Defensibility
4.9
Market Position
2.0
Operational Safety
5.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 3.47★ across 102 reviews — below category median.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 971d ago — possibly dormant.
- ⚠️ Risk: Elevated — dormant (971d since update).
🎯 For competitors: Vulnerable. Quality drift + slow updates create a clear opening for a fresh competitor with active dev cadence.
💵 For acquirers: Estimated asking range 18-32× monthly = $90K-$160K.
Composite of 8 dimensions computed deterministically from public signals — no LLM, every score traces back to a measurable input. Default weights shown; "compete" / "acquire" / "invest" lenses re-weight without re-fetching.
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 8 of 8 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Below-average rating (3.5★)METRIC | −$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| priceyREVIEW | −$800 | |
| Established app (5y old)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Localized (6 languages)METRIC | +$600 | |
| Early-stage install base (102 ratings)METRIC | +$400 |
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.
🆕 What's New · v1.5.1
Thanks for using DaysyDay!
In this version:
- Updated display of the daily data in the weekly view
- Chart includes a new data matrix displaying menstrual flow, intercourse, and mucus (An initial step to expand tracking features)… Full release notes →
In this version:
- Updated display of the daily data in the weekly view
- Chart includes a new data matrix displaying menstrual flow, intercourse, and mucus (An initial step to expand tracking features)… Full release notes →
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- DaysyDay - Zykluskalender
- Developer
- Valley Electronics
- Bundle ID
- ch.valleyelectronics.daysyday
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- 17+
- Languages
- EN, FR, DE, IT, PT, ES
Company
- Website
- Not found
- Tagline
- Today
- Description
- Find apps and games for iPhone, iPad, Mac, and more on the App Store.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Available
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $261/mo
- Top-grossing rank
- Outside top 100 in US Education
- All-time revenue
- Not found
- Pricing
- Not found
Founder
Founder data not yet collected for this app.
Funding
Funding data not yet collected for this app.
Press & Links
Press & Links data not yet collected for this app.
Contacts & Socials
Contacts & Socials data not yet collected for this app.
📈Ratings growth102 ratings+10100% lifetimeShow 3-year history estimate ▾
Tracked (55 weeks) Pre-tracking estimate (36 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.
📝 About this app
Winner of a Best of Swiss Apps 2021 Award, the companion app to the Daysy fertility tracker is designed with the feedback from our users and decades of experience in the fertility tracking market. Together, Daysy and DaysyDay provide you with the knowledge and tools needed to identify your fertile window and make informed and powerful choices about your menstrual cycle, fertility, and health.
KEY FEATURES:
Past, Present and Future… View full description on the official store →
KEY FEATURES:
Past, Present and Future… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 34 MB🔞 17+📱 iOS 12.0+🔖 v1.5.1🔄 updated 0d ago🌐 EN, FR, DE, IT, PT +1📂 Education💰 Free
📅
What Worked™ · Development Pipeline
8 EVENTS TRACKEDDetected changes in this app over its tracked lifetime — each event links cause (what changed) to effect (what moved). Sorted newest first.See full history →Version history →
2026-05
🔄
Monetization changed: freemium → free
2026-03
⭐
Rating ↑ 3.04 → 3.50 (improved 0.46★)
2026-03
📈
Crossed 100 ratings — social-proof flywheel kicking in
2025-04
📈
Crossed 50 ratings — social-proof flywheel kicking in
2021-01
⭐
Rating ↓ 4.60 → 4.27 (dropped 0.33★)
2020-12
📈
Crossed 10 ratings — social-proof flywheel kicking in
2020-12
⭐
Rating ↓ 5.00 → 4.20 (dropped 0.80★)
2020-12
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 3.57143★ | 21 | 3.57143★ this version |
| 🇧🇷 BR | 5★ | 1 | 5★ this version |
| 🇨🇦 CA | 3.625★ | 8 | 3.625★ this version |
| 🇩🇪 DE | 3.45402★ | 174 | 3.45402★ this version |
| 🇫🇷 FR | 4.11111★ | 9 | 4.11111★ this version |
| 🇬🇧 GB | 1.85714★ | 7 | 1.85714★ this version |
| 🇮🇳 IN | 0★ | 0 | — |
| 🇯🇵 JP | 5★ | 1 | 5★ this version |
| 🇺🇸 US | 3.47059★ | 102 | 3.47059★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for DaysyDay - Zykluskalender: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Valley Electronics
View all →📦 Portfolio summaryINDIE studio
3apps·$360/mocombined
Lead-app heavy — top app contributes 66%
About this analysis
Why medium confidence: 102 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does DaysyDay - Zykluskalender make per month?▴
Based on our ML-calibrated revenue forecast, DaysyDay - Zykluskalender earns approximately $260/mo. This is a US-storefront-equivalent estimate; global revenue can be several times larger for internationally-distributed apps. See the methodology page for the full formula and confidence bands.
What apps are like DaysyDay - Zykluskalender?▴
Browse the full Education category catalog to find similar apps with revenue, build cost, audience and tech stack data. Each /p/{slug} page also shows a Compare side-by-side widget with three peer apps from the same niche.
Who makes DaysyDay - Zykluskalender?▴
DaysyDay - Zykluskalender is published by Valley Electronics on the Apple App Store. See the full publisher portfolio (other apps by the same developer) via the More by developer block on the product page above.
What is DaysyDay - Zykluskalender's BU Score?▴
DaysyDay - Zykluskalender has a BU Score of 45/100 (Emerging). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.