61
Quality Score
Solid
Bella Period Calendar
✍️ bumetric analysis
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Bella Period Calendar is an Android app from TZMO SA in the Health & Fitness category, currently rated 4.1★ across 10,795 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 61: Solid (established niche player). For a Health & Fitness app, that means established niche player. 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.
💰 Revenue · today and ahead
Today
$5.0K/mo
In 12 months
$5.2K – $10.8K
In 24 months
$6.4K – $19.2K
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
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
🔬
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
Below median · 47/100MID TIERunderperforming peersRevenue Strength
3.7
Product Quality
8.2
Market Position
0.0
Growth Velocity
5.0
Defensibility
6.0
Operational Safety
9.0
Founder Strength
4.9
Monetization Maturity
1.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.11★ across 10,795 reviews — strong (top 10%).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: last update 287d ago — slow cadence.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 For competitors: Mixed picture. Worth competing if you have a clear UX or pricing edge — otherwise crowded segment.
💵 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.
🧪
Tech & Domain Intel — a100.com.pl
- Mail provider
- Google Workspace
- Tech stack
- Google Workspace
Derived from public RDAP + DNS TXT records (no scraping, no login).
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:
| Mid install base (10,795 ratings)METRIC | +$5,500 | |
| Mature app (10y old)METRIC | +$1,500 | |
| Good rating (4.1★)METRIC | +$800 | |
| 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.
App Specs
🔐 Own this app? Claim & verify MRR →🔖 vVaries with device🔄 updated 9mo ago📂 Health & Fitness💰 Free📺 Ad-supported🚀 Launched 2015 (10y old)
📝 About this app
BELLA menstrual calendar:
Do you want to know when your period starts? Or perhaps you need to know when your fertile days start in the coming month? Thanks to this free application you will be able to make a note of your cycle on your smartphone which you carry around with you almost all the time. Ovulation, infertile days or the menstruation itself will not surprise you anymore. The Bella menstrual calendar allows you to update the data, set reminders about, for example, taking the pill or describe the symptoms of the last period.… View full description on the official store →
Do you want to know when your period starts? Or perhaps you need to know when your fertile days start in the coming month? Thanks to this free application you will be able to make a note of your cycle on your smartphone which you carry around with you almost all the time. Ovulation, infertile days or the menstruation itself will not surprise you anymore. The Bella menstrual calendar allows you to update the data, set reminders about, for example, taking the pill or describe the symptoms of the last period.… View full description on the official store →
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Bella Period Calendar
- Developer
- TZMO SA
- Bundle ID
- pl.bella.kalendarzyk
- App Store URL
- Open in App Store
- Category
- Health & Fitness
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- a100.com.pl
- 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
- $954/mo
- Top-grossing rank
- Not found
- 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 growth10,795 ratings+25% lifetimeShow 3-year history estimate ▾
Tracked (1 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.
More by TZMO SA
View all →📦 Portfolio summaryINDIE studio
3apps·$1K/mocombined
Lead-app heavy — top app contributes 63%
Full revenue analysis
Read the article-style breakdown for Bella Period Calendar: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.