Neighborhood Check1.9 - App Store

Check the neighborhood before purchasing or renting you next home!
The App provide the following information:
- Population & distribution at different granularities: from county -> zipcode -> census tract -> census block (also nearby block aggregation); Including race, birth countries, households income, families, children, education levels, and much more information!
- Latest Crime data for the last 6 months (updated frequently!), including all details (e.g. date time, address, description, case number, local police department source, etc);
- Detailed School information including school attendance boundary, school test score summaries, school test scores by various student groups and dimensions (e.g. low-income, disabilities, different races, different parents education levels)
- Noise level from aviation/airport, railways, roads, highways;
- Superfund & National Priority List information, include details;
- Homeless Shelters include details;
- Electric Transmission Lines with detailed voltage information;
- Odor smell map (Only for Milpitas, BayArea, CA);
- Search any address or place on the map, and find the nearby information around that location.

You can also open this app and automatically search a shared address from other apps (e.g. RedFin, Zillow).

Our App currently covers data mostly for BayArea, California, but we are working VERY HARD to expand coverage to the entire United States.
Your questions and suggestions are always welcome, as your satisfaction is our top priority.

Our goal is to create a perfect product that meets all your needs.

Note: All information & data are available for free-trial and the following detailed data requires paid subscription:
- Detailed level population & demographic data;
- Detailed School information;
- Detailed information & links of Superfund sites and Homeless shelters;
- Electric transmission lines;

While we'd love to make everything free, the reality of server and data costs means we need to reserve certain features for our premium subscribers. By choosing the premium subscription, you'll unlock full access to all our data. Your support is invaluable - it enables us to continuously enhance our App & Services, ensuring you get the best experience possible!

Link to standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Version History - UI fix for iOS 26+;
- Crime data API updates to show more data and bug fixes;
- Other bug fixes; 1.9 Sep 28 - Bug fixes;
- Minor performance improvements; 1.8.3 11/12/2025 - Hide the Crime layer detail incidents by default, but can be toggle on/off easily; This will save load time;
- Added CA electric substation data!
- Some minor bug fixes! 1.8.2 04/28/2025 - Minor bug fixes and improvement; 1.8.1 03/06/2025 - Added CrimeRate Color Map!!!
- Minor improvements and bug fixes; 1.8 03/01/2025 Bug fixes. 1.7.2 01/25/2025 - Updated backend APIs;
- [Bug Fix] Sometimes rare crash when open link in Supportive House layer details;
- [Bug Fix] Crime layer, if multiple incidents, sometime, the scroll does not work;
- Other minor improvements. 1.7.1 01/12/2025 - Improved UI for many pages;
- Improved data quality and coverage;
- Fixed some weird crash bug; 1.7 12/23/2024 - Emergency Fix for a crash bug:
When user click the region without any population data, it may crash;

Other Feature Improvements:
- Added more accurate data source for median household income & household size;
- Added more data coverage;
- Minor UI Improvements; 1.6.1 07/07/2024 Major updates! 
For all US county and zipcode, and all census tract in California, we added the following data:
- Birth country statistics for immigrants population;
- House Occupancy status: e.g. vacant, owner occupied, or renter occupied;
- Fair market rents by number of bedrooms per house units;
- Household annual income;
- Population age distribution;
- Population Marital Status;
- Families and number of children;
- Population Education levels;
- House owner move-in years distribution;

All information is available for premium subscription users, and it's FREE for everyone at County level!

Please let us know if you have any questions! 1.6 07/05/2024 - Greatly increased the crime data coverage for more US cities. For example, just for Bay area, we've added data for Fremont, MountainView, San Francisco, Los Altos, Campbell, and many more! We will be keep adding more data!
- Some other minor improvement and bug fixes. 1.5 02/27/2024 Emergency crash fix! fixed a crash bug for old OS version (iOS 15.x) due to new framework lib dependency.
Sorry for the inconvenience! 1.4.2 02/20/2024 - UI/UX Improvements
- minor features and improvements
- improve Chinese translation & localizations
- bug fixes 1.4.1 02/12/2024 - Major UI/UX improvement;
- Support data filters on Crime map and School map;
- Minor bug fixes; 1.4 01/23/2024 Major update:
- New Crime Data Map Layer is available now!
- You can check all crime data for the last 6 months!
- The data will be updated frequently (once per 1~2 days) so you can always see up-to-date information!

Minor Things:
- Small bug fixes 1.3 01/08/2024 - Added much more detailed data for CA public school test scores. This includes school test scores by various student groups and dimensions (e.g. low-income, disabilities, different races, different parents education levels), also provides test scores for different subject area for English/Math/Science. 1.2.1 12/25/2023 - Major: California public school test score data is now available!!! You can check each school rank and scores in all subjects (e.g. English, Math, Science);
- Minor: some minor bug fixes and improvements; 1.2 12/11/2023 Major Updates!
- Added School Layer! Now you can check all U.S. public school information! Also school attendance boundary is in beta phase for part of Bayarea California schools!
- Expanded Noise data layer to more states (including the whole California, Texas, Florida, Illinois, Michigan, Wisconsin)!
- Search Enhancement improvement: Now you can directly search zip code in the population layer!
- Added User Guide & Instruction pages to demonstrate all the new features!
- Bug fixes:
** fixed the first time launch app from other apps (redfin/zillow) could not search the address;
** fixed some localization translation issues;
** fixed various small bugs. 1.1 11/27/2023 - Quick followup bug fix;
- Added "What's New" view for each newly updated version;
- Support enhanced search function that can directly parse address from URLs (and short URLs), for example, share from Redfin or Zillow apps or Safari web pages;
- Support directly open app and search address from Share extension from other apps (e.g. Redfin, Zillow); 1.0.9 11/20/2023 - Added Share extension so you can open the app and automatically search your shared address from other apps (e.g. Redfin, Zillow)
- Bug fixes and improvements;
- Added separate user data access tier;
- Internal refactoring for soon-to-come new features. 1.0.8 11/16/2023 - minor fixes and improvement;
- added Chinese localized support; 1.0.7 09/27/2023 - Explicitly tell the user about the location usage; And only requires it when needed;
- Some minor fixes; 1.0.6 09/21/2023 - UI/UX improvement;
- Show tips when there is no map data in current view;
- Show indication of layer switch tips; 1.0.5 06/05/2023 - Better UI navigation for URLs for detailed information on some data layers;
- Allow user to submit manual feedback;
- Updated App Icon; 1.0.4 05/27/2023 Added new data layer: Supportive Housing and Homeless Shelters in Bay Area. 1.0.3 05/23/2023