Comparison

Grafin vs Seismoviewer

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

Head to head
About

Grafin

This app offers a simple way to encrypt and decrypt text messages and notes locally on your device. It generates unique keys for secure communication and experimentation with coding, all while working offline and without data collection.

Highlights
  • Text encryption
  • Offline functionality
  • Local data processing
  • Unique key generation
  • Secure messaging
  • Coding experimentation
Features
Read full description

Grafin is a simple, privacy-focused app for encrypting text. Turn any message or note into encrypted text in seconds. To decrypt it, the recipient needs the correct key — a key that stays in your hands. Everything happens locally on your device. Grafin works fully offline, collects no data, and never sends your text or encryption keys anywhere. Use it to protect private notes, exchange encrypted messages while sharing the key through a separate channel, or just explore a simple way to encode and decode text.

About

Seismoviewer

This tool helps you monitor and analyze everyday vibrations from various sources like appliances, footsteps, or industrial equipment. It displays vibration magnitude, trends, and characteristics using your smartphone's accelerometer. All data processing is done locally on your device.

Highlights
  • Identify and analyze everyday vibrations
  • Monitor vibration magnitude, trends, and characteristics
  • Utilizes smartphone accelerometer
  • Local data processing on device
  • Suitable for household, industrial, and lab environments
Features
Read full description

This app is designed to identify and analyze the patterns of everyday vibrations that surround us in our daily lives. Whether it is industrial vibrations encountered in the field, laboratory equipment noise, household appliances with motors, footsteps, or the output from audio subwoofers—this tool was created to help you easily monitor the magnitude, trends, and characteristics of these vibrations. - Technical Details & Disclaimers Sensor Dependency: The vibration graphs displayed are based on the specifications of the accelerometer built into your smartphone. Therefore, graph displays may vary slightly depending on your device's hardware performance. Professional Use: If you require strictly precise or calibrated vibration data, please use professional-grade vibration measurement equipment. Data Output: Vibration data values are not output as raw numerical figures. Privacy & Data Handling: Data measured by this app is not collected externally; all processing is performed locally on the user's iPhone. 본 앱은 우리 주변 일상 속에 늘 존재하는 생활 진동의 패턴을 파악하고 분석하기 위해 제작되었습니다. 산업 현장에서 접하게 되는 진동부터 실험실 장비의 노이즈, 모터가 장착된 가전제품, 발자국 소리, 그리고 오디오 서브우퍼의 출력까지—이러한 다양한 진동의 크기와 경향성, 특성을 본 도구를 통해 손쉽게 모니터링할 수 있습니다. - 기술 세부 사항 및 유의 사항 센서 의존성: 표시되는 진동 그래프는 스마트폰에 내장된 가속도 센서의 사양에 기반하므로, 기기의 하드웨어 성능에 따라 그래프 표시가 약간씩 차이가 있을 수 있습니다. 전문적 용도: 엄밀하고 정확한 교정 데이터가 필요한 경우, 별도의 전문 진동 계측 장비를 사용하시기 바랍니다. 데이터 출력: 진동 데이터 값은 별도의 수치 형태로 출력되지 않습니다. 개인정보 및 데이터 처리: 본 앱으로 계측된 데이터는 외부로 수집되지 않으며, 모든 데이터 처리는 사용자의 iPhone 내에서만 로컬로 이루어집니다.

Screenshots

Grafin4 screens
Seismoviewer4 screens

Verdict

The call

The clearest difference is rating: Grafin at 5.0 against Seismoviewer's 4.0. Grafin also leads on update cadence (every 2 months vs every 4 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Grafin holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

UpkeepUpdate frequency

Grafin ships an update every 2 months, Seismoviewer every 4 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 8 level
Grafin versus Seismoviewer: the parameters behind the verdict, then further details
ParameterGrafinSeismoviewer
PriceFreeFree
Rating5.0 (2 ratings) — better4.0 (3 ratings)
Positive reviews—100.0% of reviews
Number of ratings23 — better
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better17.6
Further details — not scored
Size6 MB1 MB
Age rating4+4+
DeveloperGleb RagalevichHyeongRae Jo

Customer experience

Grafin

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Seismoviewer

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Grafin

No in-app purchases

None

Seismoviewer

No in-app purchases

Questions

Is Grafin free?
Grafin is free to download, with no in-app purchases.
Is Seismoviewer free?
Seismoviewer is free to download, with no in-app purchases.
Which has better reviews, Grafin or Seismoviewer?
Grafin is rated higher. Grafin averages 5.0 out of 5 from 2 ratings, while Seismoviewer averages 4.0 from 3 ratings.
Do Grafin or Seismoviewer have ads?
Neither Grafin nor Seismoviewer shows ads.
Which is updated more often, Grafin or Seismoviewer?
Grafin ships an update every 2 months, and Seismoviewer every 4 months. Most recently, Grafin was updated on October 30, 2026 and Seismoviewer on November 5, 2026.

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