Physical Constants vs Wispar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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).
Wispar
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Wispar is your personal research companion — a privacy-friendly app for exploring academic journals and scientific articles. Using the Crossref and OpenAlex APIs, Wispar helps you stay updated on your favourite journals. Follow journals to receive the latest research abstracts in your main feed — no account required. - Search scholarly articles and journals - Follow journals to stay updated - Access open-access articles via Unpaywall - Use EZproxy to unlock paywalled research - Chat with AI about your downloaded papers - View graphical abstracts - Send articles to your Zotero library - Translate abstracts to your preferred language - Built for researchers, students, and the academically curious Wispar is user-friendly, open-source, and designed to respect your privacy.
Screenshots
Verdict
The clearest difference is ads: Wispar at none against Physical Constants's shown. Wispar also leads on update cadence (monthly vs every 9 months). Physical Constants's advantage is iOS requirement (12.0 vs 16.0). On price, 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.
Physical Constants ships an update every 9 months, Wispar monthly. The most recent releases landed on October 23, 2026 and October 8, 2026 respectively.
| Parameter | Physical Constants | Wispar |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 9 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 25 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Takuya Ishikawa | Francis Lapointe |
In-app purchases
Physical Constants
No in-app purchases
Wispar
No in-app purchases
Questions
Is Physical Constants free?
Is Wispar free?
Do Physical Constants or Wispar have ads?
Which is updated more often, Physical Constants or Wispar?
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