Go HAM - 531 Calculator
54
Quality Score
Solid
✍️ Bumetric analysis
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Go HAM - 531 Calculator is an Android app from Go HAM! in the Health & Fitness category, currently rated 4.5★ across 72 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 54: 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.
💰 Monthly revenue · now vs forecast
● Right now
$500
per month
→
12-mo forecast
$437 – $1575
per month
→
24-mo forecast
$405 – $3644
per month
INDIE 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
1 snapshots on record
Rating
4.5
Reviews
72 reviews
Forecast Revenue / mo
$500
Snapshots tracked
1
since Sep 2026
ONE-TIME · BUILD
💰 Estimated build cost
$160K
↳ What it cost to build · not monthly revenue
Likely range $120K – $215K
$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 |
| ⚙ Health & Fitness complexity ×1.40 | +$20K |
| 🌐 Cross-platform reach (iOS + Android) | +$38K |
| ⚙ 8.8y maintenance × ~1-person team | +$52K |
Total estimate
$160K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$10K
↳ What it would sell for · not monthly revenue
Marketplace range $5K – $15K · 20× MRR multiple
💸
~0.1× build cost (under-water)
Synthetic estimate. Multiple band derived from ad-supported + 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
| 📺 Ad-supported base | 15× MRR |
| 📅 8.8y proven track record | +20% |
| ⭐ ★ rating ≥ 4.4 (solid) | +8% |
| 🏷 Health & Fitness category multiple | +10% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
20× MRR
🛠 Estimated tech stack
🤖
Native Android (Kotlin)
High confidence · 80%
Also possible
Flutter
Heuristic guess from app bundle size, category, store description signals, and release-date stack era. Bumetric does not disassemble binaries — for binary-level certainty you would need an SDK intelligence tool or the manifest itself. Reasoning chain on the right. Full ruleset on /methodology.
Signals we read
| 🏷 Category context | Health & Fitness |
| 📦 Compact Android bundle | → Native Kotlin |
💀 Maintenance status
Likely abandoned
95%
Last shipped 2018-02-08 · 3181 days ago
0 · Active
50 · At risk
100 · Abandoned
Heuristic risk score from time-since-last-update + ratings velocity proxy + Editor's Choice / curated featuring signals. Calibrated against 2024-2025 app-store ranking decay reports. Not a guarantee — a quiet app with a healthy codebase looks the same as an abandoned one until something breaks. Full math on /methodology.
Risk signals
| 📅 8y+ since last update | Likely abandoned |
| 👥 Small user base (72 ratings) + 8.8y old | +10% (solo-project pattern) |
Verdict
Likely abandoned
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$500/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
Direction
Headwinds: rating drift may slow acquisition
6 months
$426 – $993
12 months
$437 – $1.6K
24 months
$405 – $3.6K
Compound growth at +6.0% MoM (tier baseline for INDIE). Range widens with horizon — typical noise band ±40% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Pre-traction · 40/100INDIE TIERlimited signalGrowth Velocity
5.0
Founder Strength
5.5
Product Quality
3.6
Revenue Strength
2.7
Monetization Maturity
1.0
Defensibility
7.2
Market Position
0.0
Operational Safety
7.0
- 💰 Revenue: Marginal — $200 - $1250/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.52★ across 72 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 3181d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (3181d since update).
🎯 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 = $9K-$16K. Portfolio play ($918/mo combined) commands premium.
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 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (4.5★)METRIC | +$2,200 | |
| Mature app (8y old)METRIC | +$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Pre-traction phase (72 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.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Go HAM - 531 Calculator
- Developer
- Go HAM!
- Bundle ID
- com.jumpyware.goham_531calculator
- App Store URL
- Open in App Store
- Category
- Health & Fitness
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- appreviewdesk.com
- Tagline
- Not found
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Reported revenue signal / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- Model estimate / mo
- $500/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.
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
<b>DISCLAIMER :</b> Please note that this app, Go HAM - 531 Calculator is an unofficial application designed to assist you with your workout. THIS APP IS BY NO MEANS CONNECTED TO WENDLER HIMSELF, the creator of Wendler 531. Please support Wendler himself by buying his books.
For more information on Wendler 531, please visit:
https://jimwendler.com/
<b>Permissions used :</b>
• Vibration: Used along with sound to notify rest timer completion.
With the Go HAM - 531 Calculator, you can customize your workout and calculate your numbers based on your 1-RM lifts.… View full description on the official store →
For more information on Wendler 531, please visit:
https://jimwendler.com/
<b>Permissions used :</b>
• Vibration: Used along with sound to notify rest timer completion.
With the Go HAM - 531 Calculator, you can customize your workout and calculate your numbers based on your 1-RM lifts.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →🔖 vVaries with device🔄 updated 8y ago📂 Health & Fitness💰 Free📺 Ad-supported🚀 Launched 2018 (8y old)
🔔
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📝 Description
95
BU Score · Transcendent
More by Go HAM!
View all →📦 Portfolio summaryINDIE studio
10apps·$13K/mocombined
✓ Diversified — top app contributes 22%; risk spread across portfolio
About this analysis
Why low confidence: only 72 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
❓ Frequently Asked Questions
9 answers · auto-generated from this app's public dataHow much does Go HAM - 531 Calculator make per month?▴
Based on our ML-calibrated revenue forecast, Go HAM - 531 Calculator earns approximately $500/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.
Is Go HAM - 531 Calculator profitable?▴
With estimated build cost $160K and monthly revenue $500, Go HAM - 531 Calculator looks well below break-even — current monthly revenue is much smaller than the estimated build cost. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
What apps are like Go HAM - 531 Calculator?▴
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.
What is Go HAM - 531 Calculator built with?▴
Our heuristic places Go HAM - 531 Calculator on the Native Android (Kotlin) stack (High confidence, 80%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Flutter.
Is Go HAM - 531 Calculator still actively maintained?▴
Maintenance status: Likely abandoned (95% abandonment risk). Last shipped version was 8+ years ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would Go HAM - 531 Calculator sell for?▴
Estimated acquisition value: $10K (marketplace range $5.0K – $15K). Calculated as 20× monthly revenue using the standard multiple for the detected monetization model + adjustments for age, rating quality and category demand. Calibrated against 2024-2026 Flippa / Acquire.com / MicroAcquire closed-deal medians.
When was Go HAM - 531 Calculator last updated?▴
Go HAM - 531 Calculator last shipped a new version on 2018-02-08 — more than 8 year(s) ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Go HAM - 531 Calculator?▴
Go HAM - 531 Calculator is published by Go HAM! 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 Go HAM - 531 Calculator's BU Score?▴
Go HAM - 531 Calculator has a BU Score of 54/100 (Solid). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.