Comparison

EchoPaper vs Houstudia Calculator

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

EchoPaper

Features
Read full description

EchoPaper makes it effortless to capture ideas, meetings, and thoughts. Simply speak, and your words become structured, searchable notes. Powered by on-device Whisper transcription and AI summaries, EchoPaper transforms messy recordings into clear, actionable knowledge. Whether you are a student, journalist, professional, or creative, EchoPaper helps you remember more, organize better, and stay focused. Key Features โ€ข One-tap voice capture โ€“ start recording instantly on iPhone, iPad, or Apple Watch. โ€ข Accurate transcription โ€“ powered by Whisper, running locally for privacy and speed. โ€ข AI summaries and rewrites โ€“ get concise highlights, clean paragraphs, or action lists. โ€ข Smart note organization โ€“ add tags, search by keyword or meaning, and group notes. โ€ข Task extraction and reminders โ€“ automatically detect todos and sync with Calendar or Reminders. โ€ข Semantic search โ€“ find notes even when you cannot remember the exact words. โ€ข CloudKit sync โ€“ secure, private, and seamless across all Apple devices. โ€ข Apple Watch support โ€“ raise your wrist to record instantly, mark key moments. โ€ข Minimal and modern design โ€“ inspired by the Liquid Glass aesthetics of iOS 26. Why EchoPaper? โ€ข Built with privacy in mind: notes and audio stay on your device unless you choose cloud AI. โ€ข Designed for clarity: simple UI, powerful AI features. โ€ข Always with you: synced securely across iPhone, iPad, Mac, and Apple Watch. Turn every echo of your voice into paper clarity.

About

Houstudia Calculator

Features
Read full description

Experience calculating reimagined! Houstudia Calculator solves expressions in real-time as you type, with an intuitive memory system that makes complex calculations effortless. Key Features: Live Results - Watch your calculations solve instantly as you type Smart Memory - Tap any answer to store it, then tap again to reuse it in new expressions Multi-Calculator Tabs - Switch between four color-coded calculators to work on different problems simultaneously without losing your work No More Clearing - Calculate tips, multiply numbers, and find square roots all while keeping your previous results visible Perfect for students, engineers, and anyone who needs a calculator that works as fast as they think!

Screenshots

EchoPaper4 screens
Houstudia Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Houstudia Calculator at none against EchoPaper's 3. Houstudia Calculator also leads on iOS requirement (15.1 vs 18.0). EchoPaper's advantage is update cadence (every 2 days vs every 2 months). On price, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. EchoPaper sells 3 one-off in-app purchases. Houstudia Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

EchoPaper ships an update every 2 days, Houstudia Calculator every 2 months. Both last shipped on October 30, 2026.

Scorecard3 real differences ยท 3 level
EchoPaper versus Houstudia Calculator: the parameters behind the verdict, then further details
ParameterEchoPaperHoustudia Calculator
PriceFreeFree
Update frequencyEvery 2 days โ€” betterEvery 2 months
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, Apple Watch โ€” betteriPhone, iPod
Requires iOS18.015.1 โ€” better
Further details โ€” not scored
Size16 MB20 MB
Age rating4+12+
DeveloperHIROMOTO TSUJIHoustudia

In-app purchases

3 purchases

EchoPaper

One-time3
  • Coffee$0.99
  • Notebook$2.99
  • Pen$4.99
None

Houstudia Calculator

No in-app purchases

Questions

Is EchoPaper free?
EchoPaper is free to download, with in-app purchases available.
Is Houstudia Calculator free?
Houstudia Calculator is free to download, with no in-app purchases.
Do EchoPaper or Houstudia Calculator have ads?
Neither EchoPaper nor Houstudia Calculator shows ads.
Which is updated more often, EchoPaper or Houstudia Calculator?
EchoPaper ships an update every 2 days, and Houstudia Calculator every 2 months. Most recently, EchoPaper was updated on October 30, 2026 and Houstudia Calculator on October 30, 2026.

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