Comparison

HazMat Reference vs Lost Person Behavior

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

Head to head
About

HazMat Reference

Quickly access critical information on hazardous materials for handling, storage, and incident response. Features include advanced search, sorting, and filtering of materials from key regulatory tables and guides. Offline access ensures availability in any situation.

Highlights
  • ERG 2024 data
  • NIOSH, CFR/HMT, NFPA, GHS information
  • Advanced search, sort, and filter
  • Offline access
  • NFPA Fire Diamond
  • Physical descriptions and CAS#
  • DOT incident data filter
Features
Currently charting
Read full description

Your best quick reference for hazardous materials. Includes: NIOSH, CFR/HMT, NFPA, GHS, CAMEO information. This app serves as a quick reference and educational tool for employees that are involved with the regular handling and storage or incident response of Hazardous Materials. Materials from the Hazardous Material Table (HMT) and Emergency Response Guidebook (ERG) are listed in easy to review form with advanced search, sort, and filter capabilities. Pertinent information from the HMT, ERG, NIOSH and other sources are listed with the proper placard and hazard class for each material. The Hazardous Materials Table (HMT) 49 CFR §172.101 is a list of hazardous materials by proper shipping name that governs the transportation, marking and labeling by all modes: air, water, rail, and highway. Understanding and knowing how to use information in the HMT is the first step toward compliance. The Emergency Response Guidebook (ERG) is primarily a guide to aid first responders in quickly identifying the specific or generic hazards of the material(s) involved in the incident, and protecting themselves and the general public during the initial response phase of the incident. The ERG is updated and released every 4 years by the D.O.T. No internet connection required. Find materials by name or UN Identifier. Includes information from all tables and reference pages in the ERG. Additional Features: * Filter/Sort Materials with DOT Reported Incidents in the last 12 months * History of materials - most recent or most viewed * NFPA Fire Diamond: quick visual ref for Health, Fire, Reactivity, and other hazards * Physical descriptions for most chemicals * CAS#, RTECS# with NIOSH IDLH and exposure information * Quicksort by UN ID#, guide #, name or number of incidents

About

Lost Person Behavior

This app provides critical information for search and rescue operations, guiding officials on where to look for missing persons. It offers detailed behavioral profiles, tactical briefings, and investigative questions tailored to 41 subject categories. The app functions offline, making it reliable in remote locations.

Highlights
  • 41 subject categories
  • Subject category wizard
  • Behavioral profiles
  • Tactical briefings
  • Investigative questions
  • Spatial and survival statistics
  • Offline functionality
Features
Currently charting
Read full description

The Lost Person Behavior App is based upon the Search and Rescue (SAR) international gold standard reference tool on where to look for lost and missing persons. Every Public Safety Official needs to know where the missing person might be, what to ask, where to look, and what to do when minutes matter. The app was built around the field needs of Public Safety Officials. No matter how remote the location, the app continues to function since no network connection is required, once installed. This life-saving information is customized for 41 different subject categories. The categories are organized into a hierarchy of groups including external factors (abductions, aircraft), water incidents (boats and persons in the water), wheeled incidents (ATV, mountain bikes, vehicles, etc.), mental states (autism, dementia, despondent, intellectual disability, mental illness, substance intoxication), children (in five different age groups), and eighteen outdoor activities (hiker, hunter, climber, gatherer, skier, etc.). The app guides the user in selecting the correct subject category by several means. The subject category wizard allows the user to select potential scenarios and then will suggest the best match for the subject category. For example, if a child was riding his bicycle and was then known to be abducted, the user could select Child, Wheel/Motorized, and Abduction; the wizard would suggest using the abduction category. Alternately, the user can go straight to a subject category by using favorites, an alphabetical list, or the hierarchy list. Once the subject category is selected, the Lost Person Behavior App provides the user with: • behavioral profiles • tactical briefings • specific investigative questions • spatial and survival statistics • suggestions for initial tasks (reflex tasking). The all-new tactical briefings distill the statistics and profiles to the key points that every field searcher must know. The more extensive profile, full statistics, and suggested initial tasks assist even the seasoned search planner. The highly detailed questions for the investigation resulted from decades of SAR experience and thousands of missions. The app even allows you to email a checklist of these critical tasks and interview questions so that you may print them out. The email could also be used for providing remote support or documenting tasks that have been completed. Determining where to look is one of the major functions of the search statistics, which are now provided in a graphical and tabular format. The statistics from thousands of SAR missions allow the search planner to see where similar previous search subjects were found. The SAR statistics include: • Distance from the Initial Planning Point • Elevation model (likelihood of going up, down, or staying at the same elevation) • Mobility model (how long will the subject keep moving) • Dispersion angle (given a direction of travel, how well does that predict subject’s location) • Track Offset model (how far away from a feature such as a road or trail is subject found) • Find location (at what type of geographic feature was the subject found) • Scenario (what caused the subject to become missing) • Survivability overall (what is the overall chance of finding the subject alive or injured) • Survivability rate (how does survivability rate change in 24-hour increments). The Lost Person Behavior App can be easily customized to only show the statistical information you actually need. The user can customize for ecoregion, terrain, and urban incidents. The user can view the data in both metric and English units. Several additional helpful tools are built into the app. Contextual help is provided on every page with additional information boxes, which explain every element of the app on the page you need. The information page provides information about the bike wheel model used to describe initial tactical deployment (reflex tasking), a glossary, help, and contact information.

Screenshots

HazMat Reference4 screens
Lost Person Behavior3 screens

Verdict

The call

The clearest difference is rating: HazMat Reference at 4.8 against Lost Person Behavior's 4.2. HazMat Reference also leads on ratings volume (1.7K vs 13) and review sentiment (96% vs 71%). Lost Person Behavior's advantage is iOS requirement (9.0 vs 14.0). On update cadence, ads, in-app purchases and monetization model 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

HazMat Reference costs $4.99 and Lost Person Behavior $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

HazMat Reference holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: HazMat Reference has 1.7K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 96% of HazMat Reference's written reviews are positive against 71% of Lost Person Behavior's.

UpkeepUpdate frequency

HazMat Reference ships an update every 4 months, Lost Person Behavior every 2 months. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

Scorecard5 real differences · 6 level
HazMat Reference versus Lost Person Behavior: the parameters behind the verdict, then further details
ParameterHazMat ReferenceLost Person Behavior
Price$4.99 — better$9.99
Rating4.8 (1.7K ratings) — better4.2 (13 ratings)
Positive reviews95.9% of reviews — better71.4% of reviews
Number of ratings1.7K — better13
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#25#19 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.09.0 — better
Further details — not scored
Size75 MB11 MB
Age rating12+12+
DeveloperThatsMyStapler Inc.dbS Productions

Customer experience

HazMat Reference

All ratings1,723 ratings
Positive96.4%
Neutral1.7%
Negative1.9%
Written reviews170 reviews
Positive95.9%
Neutral2.4%
Negative1.8%

Lost Person Behavior

All ratings13 ratings
Positive69.2%
Neutral23.1%
Negative7.7%
Written reviews14 reviews
Positive71.4%
Neutral21.4%
Negative7.1%

Bugs and requests

HazMat Reference

Reported bugs

1 issue
  • Bulk packaging information part of CFR 49 won't load

Requested features

2 requests
  • Format for larger phones
  • Ability to print guide or reference material

Lost Person Behavior

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

HazMat Reference

No in-app purchases

None

Lost Person Behavior

No in-app purchases

Questions

Is HazMat Reference free?
HazMat Reference costs $4.99, with no in-app purchases.
Is Lost Person Behavior free?
Lost Person Behavior costs $9.99, with no in-app purchases.
Which has better reviews, HazMat Reference or Lost Person Behavior?
HazMat Reference is rated higher. HazMat Reference averages 4.8 out of 5 from 1.7K ratings, while Lost Person Behavior averages 4.2 from 13 ratings.
Do HazMat Reference or Lost Person Behavior have ads?
Neither HazMat Reference nor Lost Person Behavior shows ads.
Which is updated more often, HazMat Reference or Lost Person Behavior?
HazMat Reference ships an update every 4 months, and Lost Person Behavior every 2 months. Most recently, HazMat Reference was updated on October 13, 2026 and Lost Person Behavior on October 8, 2026.
Which is more popular, HazMat Reference or Lost Person Behavior?
HazMat Reference currently peaks at #25 in the App Store charts, and Lost Person Behavior at #19. Chart position reflects recent download velocity rather than total install base.

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