32K iOS Apps Tracked Updated 5 min ago Revenue Forecasts
Add an app Create Account Sign In
Home
iOS Apps
iOS Apps LIVE
All iOS Apps 32K Games Productivity Health & Fitness Finance Photo & Video Social Networking
Android Apps
Android Apps LIVE
All Android Apps 1.3M Tools Games Entertainment Photography Finance Education Music & Audio Personalization
Scientific Calculator fx-991 icon
📅 Development History

Scientific Calculator fx-991

by Dinh Phuc · News · View full /p/ profile →

📊 Tracking summary

Tracked since
2023-12-17
20 snapshots captured
Events detected
11
cause-and-effect changes
Current rating
4.53★
333 reviews
Current revenue
$86 /mo
ML forecast or verified

📈 Reviews growth with event markers

Cumulative review count over time. Each marker (🚀⭐💲🔄🔧📈📊📦) is a detected event — click anything in the timeline below to scroll to its row.

1 366 2023-12-17 2026-06-30 🔧 🔄 ⭐ 📈 📈 ⭐ ⭐ ⭐ ⭐ ⭐ 🚀

📅 What Worked™ · full timeline (11 events)

Every detected change in Scientific Calculator fx-991 since we started tracking. Each event shows the cause (what changed) and effect (measured impact over 30 days after). Confidence chip flags whether the attribution is clean or muddied by co-occurring events.

2026-05
🔧
Shipped update — v1.8.3 → v1.8.8
→ 30 days after: reviews +33 high confidence
2026-05
🔄
Monetization changed: freemium → free
→ 30 days after: reviews +33 high confidence
2026-03
⭐
Rating ↑ 3.78 → 4.70 (improved 0.92★)
→ 30 days after: revenue +$80/mo · rating +0.92★ · reviews +260 high confidence
2026-03
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$80/mo · rating +0.92★ · reviews +260 high confidence
2025-09
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: rating −0.69★ high confidence
2025-01
⭐
Rating ↑ 3.60 → 4.00 (improved 0.40★)
→ 30 days after:
2024-12
⭐
Rating ↑ 3.25 → 3.60 (improved 0.35★)
→ 30 days after: rating +0.40★ high confidence
2024-11
⭐
Rating ↓ 3.67 → 3.25 (dropped 0.42★)
→ 30 days after: rating +0.35★ high confidence
2024-06
⭐
Rating ↑ 3.00 → 3.67 (improved 0.67★)
→ 30 days after:
2024-05
⭐
Rating ↓ 5.00 → 3.00 (dropped 2.00★)
→ 30 days after: rating +0.67★ high confidence
2023-12
🚀
First tracked snapshot — initial data captured
→ 30 days after:

💡 Want to grow this app's revenue?

Get a free AI ASO audit — title, subtitle, description, screenshots all reviewed and rewritten for higher conversion.

Run free AI audit →
← Back to Scientific Calculator fx-991 full profile