Period Calendar Period Tracker
87
Quality Score
Excellent
✍️ bumetric analysis
“
This Android app targets the highly competitive women’s health tracking niche, directly competing with established players like Flo and Clue. Its strong user rating, backed by over 4.8 million reviews, signals significant traction and a mature product with a large, engaged user base. This volume of positive feedback suggests the app has moved well beyond early growth stages, establishing itself as a dominant player. Given its free monetization model, the primary revenue driver in this category is typically a premium subscription offering advanced features like expert content, ad removal, or deeper analytics. Founders in this space often see a strong conversion from a free tier to a monthly or annual subscription, with average revenue per user (ARPU) heavily influenced by the value proposition of these premium tiers rather than direct one-time purchases.
BU Score 87 · Excellent — strong product-market fit. The full Investment Matrix below scores 8 dimensions including monetisation, growth, and operational risk.
Track snapshot history and revenue forecast in the Performance section below.
💰 Monthly revenue · now vs forecast
● Right now
$1.2M
per month
→
12-mo forecast
$1.3M – $2.0M
per month
→
24-mo forecast
$1.5M – $2.8M
per month
BIG 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
$130K
↳ What it cost to build · not monthly revenue
Likely range $100K – $175K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~1.5y at current MRR
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 |
| 💎 In-app purchase plumbing | +$9K |
| ⚙ Health & Fitness complexity ×1.40 | +$23K |
| 🌐 Cross-platform reach (iOS + Android) | +$45K |
Total estimate
$130K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$275K
↳ What it would sell for · not monthly revenue
Marketplace range $225K – $375K · 38× MRR multiple
💸
~2.1× return on build cost
Synthetic estimate. Multiple band derived from iap / freemium model + age, rating quality, category demand, and user-base maturity. Calibrated against 2024-2026 indie-app-marketplace closed-deal medians. Full math + comparable deal list on /methodology.
How the multiple was built
| 💎 IAP / freemium model base | 28× MRR |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Health & Fitness category multiple | +10% |
| ⭐ Mature user base (1M+ ratings) | +8% |
Final multiple
38× MRR
👥 Estimated audience size
341.0M
Lifetime downloads (US-equivalent)
Monthly active
75.0M
Daily active
26.0M
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
| 📲 Health & Fitness engagement | ~70 installs / rating |
| 🔁 Health & Fitness D30 retention | 22% |
| 📍 DAU / MAU stickiness | 0.35 |
DAU / MAU
35% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$1.2M/mo · ML-estimated from 234 triggers
Growth rate
+2.5% MoM · BIG tier baseline (compound monthly)
6 months
$1.2M – $1.6M
12 months
$1.3M – $2.0M
24 months
$1.5M – $2.8M
Compound growth at +2.5% MoM (tier baseline for BIG). Range widens with horizon — typical noise band ±15% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Mixed signals · 65/100BIG TIERcompetitive but cautiousGrowth Velocity
5.0
Founder Strength
6.2
Product Quality
9.8
Revenue Strength
6.1
Monetization Maturity
5.0
Defensibility
10.0
Market Position
0.0
Operational Safety
10.0
- 💰 Revenue: Healthy — $480K - $2640K/mo · BIG tier · medium-low confidence, trajectory unclear.
- ⭐ Quality: 4.89★ across 4,872,650 reviews — exceptional (top 1% in category).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 For competitors: Strong subscription moat. Hard to outcompete on retention. Better angle: free alternative with one-time purchase, or feature parity for an underserved sub-niche.
💵 For acquirers: Estimated asking range 18-32× monthly = $21.6M-$38.4M.
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 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| High install base (4,872,650 ratings)METRIC | +$12,000 | |
| Excellent rating (4.9★)METRIC | +$2,200 | |
| securityREVIEW | +$1,800 | |
| Mature app (14y old)METRIC | +$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 |
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.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Period Calendar Period Tracker
- Developer
- Simple Design Ltd.
- Bundle ID
- com.popularapp.periodcalendar
- App Store URL
- Open in App Store
- Category
- Health & Fitness
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- simpledesign.ltd
- 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
- $276/mo
- Top-grossing rank
- Not found
- All-time revenue
- Not found
- Pricing
- $0.99 - $59.99 per item
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 growth4,872,650 ratings+22% lifetimeShow 3-year history estimate ▾
Tracked (3 weeks) Pre-tracking estimate (36 weeks) · model-based, ±5% noise · anchored to release date and current value
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
★The rating 4.9★ period calendar!
Popular in 63 Countries.
Trusted by 300 million Users.
Keep track of your menstrual cycles with Period Calendar. It tracks your periods, blood flow, cycles, ovulation and the chance of conception. Period tracker helps both women looking to <b>conceive</b> and those trying to <b>birth control</b>.
Period Tracker is useful, whether you have <b>irregular periods</b> or regular periods. It can track your <b>chance of pregnancy</b> every day.… View full description on the official store →
Popular in 63 Countries.
Trusted by 300 million Users.
Keep track of your menstrual cycles with Period Calendar. It tracks your periods, blood flow, cycles, ovulation and the chance of conception. Period tracker helps both women looking to <b>conceive</b> and those trying to <b>birth control</b>.
Period Tracker is useful, whether you have <b>irregular periods</b> or regular periods. It can track your <b>chance of pregnancy</b> every day.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →🔖 vVaries with device🔄 updated 0d ago📂 Health & Fitness💰 Free📺 Ad-supported💎 IAP $0.99 - $59.99 per item
📅
What Worked™ · Development Pipeline
3 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 →
2026-07
🔧
Shipped update — vVaries with device → vVaries with device
→ 30 days after: reviews +5,433 high confidence
2026-06
🔧
Shipped update — vVaries with device → vVaries with device
→ 30 days after: reviews +15,065 high confidence
2026-05
🚀
First tracked snapshot — initial data captured
→ 30 days after: reviews +9,632 high confidence
🔔
Track this app’s revenue
FREEGet an email when revenue moves by your threshold. No spam, unsubscribe in one click.
📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for Period Calendar Period Tracker: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Simple Design Ltd.
View all →📦 Portfolio summaryINDIE studio
24apps·$5K/mocombined
✓ Diversified — top app contributes 7%; risk spread across portfolio
About this analysis
Why high confidence: 4,872,650 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does Period Calendar Period Tracker make per month?▴
Based on our ML-calibrated revenue forecast, Period Calendar Period Tracker earns approximately $7.4K/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 Period Calendar Period Tracker?▴
Browse the full Health & Fitness 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 Period Calendar Period Tracker?▴
Period Calendar Period Tracker is published by Simple Design Ltd. on the Google Play 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 Period Calendar Period Tracker's BU Score?▴
Period Calendar Period Tracker has a BU Score of 87/100 (Excellent). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.