ESS2go vs Physical Constants
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ESS2go
This educational tool helps emergency responders plan and manage disaster situations. It provides features for team contact management, task checklists, resource calculation, and best practice guides for worker care.
- Team contact management
- Function checklists
- Evacuee meal calculation
- Staffing needs planning
- Guides and standards reference
- Worker care reminders
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Designed for ESS reception centre and group lodging team responders, this is an educational tool used to teach about planning and responding to emergencies and disasters – it may also be used for practical purposes. Create and store your team contacts, use function checklists, calculate number of meals for evacuees, plan for staffing needs, refer to guides/standards, receive reminders for worker care best practices!
Physical Constants
Access a comprehensive list of physical constants, organized by category for easy searching. This app supports all AppStore languages and allows users to report corrections via email.
- Physical constants database
- Categorized by topic
- Search functionality
- Multi-language support
- User feedback for corrections
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Application that displays the physical constants. Classified by category, easy to search. Supports all languages in the AppStore. If you find something to be corrected, please send an E-mail (English or Japanese).
Screenshots
Verdict
The clearest difference is ads: ESS2go at none against Physical Constants's shown. ESS2go also leads on monetization model (free vs ad-supported). Physical Constants's advantage is update cadence (every 9 months vs every 37 months). On price, review sentiment, in-app purchases and device support 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.
ESS2go ships an update every 37 months, Physical Constants every 9 months. The most recent releases landed on September 23, 2026 and October 2, 2026 respectively.
| Parameter | ESS2go | Physical Constants |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.3 (3 ratings) — better |
| Positive reviews | 33.3% of reviews | 33.3% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 37 months | Every 9 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 | 12.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Justice Institute of British Columbia | Takuya Ishikawa |
Customer experience
ESS2go
Physical Constants
In-app purchases
ESS2go
No in-app purchases
Physical Constants
No in-app purchases
Questions
Is ESS2go free?
Is Physical Constants free?
Do ESS2go or Physical Constants have ads?
Which is updated more often, ESS2go or Physical Constants?
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