QuakeJP vs iShindo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QuakeJP
Visualize earthquake data for Japan with detailed historical records and a color-coded map. Explore recent and major seismic events, with information available for quakes of magnitude 5.0 and above.
- Latest earthquake display
- Historical major earthquake data (1900-)
- Two-year big quake records (M5.0+)
- Color-coded pins by magnitude
- Detailed earthquake information on tap
- Map zoom and pan functionality
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This application displays earthquakes in Japan very graphically. Main Features *Latest Quakes : display latest about 20 earthquakes in Japan *Big Quakes in 2-year : display earthquakes in magnitude 5.0 or more for two years in Japan *Big Quakes (1900-) : display major earthquakes since 1900 in Japan How To *Each pin corresponds to an earth quake. Each pin classifies according to the scale of the earthquake. -Over M7.0 : red color pin -Over M6.0 : purple color pin -Under M6.0 : green color pin *When each pin is tapped, details of the corresponding earth quake are displayed in the under box. When a detail information is selected, the corresponding pin is displayed in the center of your screen. *The reduced scale changes by Pinch In (Pinch Out) over the map. Application Consideartion *This application can't display earthquakes in real time. *This application uses the information of earthquakes from Japan Weather Association. *This application can display the earthquake about 20 min. after the announcement. *This application doesn't display the earthquake which detail is unknown. *This application displays the depth of a shallow earthquake as 0km. *When the earthquakes happened in the same place, each hypocenter information is displayed by tapping the same pin. *The information about major earthquakes is referring to the book(science chronology) and the information on Wikipedia.
iShindo
This app measures earthquake seismic intensity using your iPhone or iPad. It offers multiple measurement scales and automatically records events, allowing for photo capture. Data can be synced across up to 10 devices via iCloud.
- Seismic intensity measurement (JMA, MMI, SI)
- Automatic earthquake event recording
- Photo capture during events
- iCloud sync across devices
- JMA Seismic Intensity Scale (0-7)
- Modified Mercalli Intensity Scale (I-XII)
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iShindo measures earthquake seismic intensity using your iPhone or iPad. FEATURES • Seismic intensity measurement based on the JMA (Japan Meteorological Agency) method • Modified Mercalli Intensity (MMI) measurement • Spectral Intensity (SI) measurement • Automatic earthquake event recording and list view • Photo capture during earthquake events • iCloud sync across devices (up to 10) INTENSITY SCALES • JMA Seismic Intensity Scale (0–7) • Modified Mercalli Intensity Scale (I–XII) TECHNOLOGY Intensity calculations comply with the JMA instrumental intensity method. SI values comply with the MLIT-specified method. Developed with patented technology from joint research with NIED (National Research Institute for Earth Science and Disaster Prevention). NOTE Measurements are not from JMA-certified seismometers. Values are "equivalent intensity" for reference only. REQUIREMENTS • iOS 16.0 or later • iPhone 8 / X or later, iPad with iPadOS 16
Screenshots
Verdict
The clearest difference is rating: iShindo at 4.0 against QuakeJP's 2.3. iShindo also leads on review sentiment (53% vs 32%). QuakeJP's advantage is iOS requirement (9.0 vs 16.0). On price, ratings volume, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
iShindo holds the better App Store score, 4.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews point the same way: 32% of QuakeJP's written reviews are positive against 53% of iShindo's.
QuakeJP ships an update every 6 months, iShindo every 7 months. The most recent releases landed on October 23, 2026 and October 17, 2026 respectively.
| Parameter | QuakeJP | iShindo |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) | 4.0 (3 ratings) — better |
| Positive reviews | 32.3% of reviews | 53.3% of reviews — better |
| Number of ratings | 3 | 3 |
| Update frequency | Every 6 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | doublek | Hakusan Corporation |
Customer experience
QuakeJP
iShindo
In-app purchases
QuakeJP
No in-app purchases
iShindo
No in-app purchases
