Prime Checker vs TeXmemo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prime Checker
This app performs advanced mathematical calculations for numbers, including integer factorization, Euler's totient function, and solving specific Diophantine equations. It utilizes advanced algorithms for factorization and primality testing.
- Integer factorization
- Euler's totient function
- Primitive root calculation
- Diophantine equation solver
- Primality testing
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This application calculate values of given number which are described below: * Integer factorization * Euler's totient function * Primitive root (if exist) * x, y where x^2 + y^2 = p if p is 4n+1 * x, y where x^2 + 3y^2 = p if p is 3n+1 * x, y where x^2 + 2y^2 = p if p is 8n+1 or 8n+3 * x, y where x^2 - 2y^2 = p if p is 8n+1 or 8n+7 This application uses Fermat algorithm, Pollard's rho algorithm and Lenstra's ECM for factorization, Miller–Rabin algorithm for primality test
TeXmemo
This simple note-taking app allows users to beautifully tweet text containing mathematical formulas. It automatically adds margins for clear visibility of equations on timelines.
- Tweet text with math formulas
- Automatic margin addition
- Clear equation display on timelines
- Simple note-taking interface
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数式の入った文章を綺麗にツイートできる、シンプルなメモアプリです。 ツイートするときに自動的に余白が追加されるので、タイムライン上でも見やすい数式のツイートができます。
Screenshots
Verdict
The clearest difference is ads: Prime Checker at none against TeXmemo's shown. Prime Checker also leads on review sentiment (96% vs 67%) and monetization model (free vs ad-supported). TeXmemo's advantage is update cadence (daily vs every 17 months). 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.
Prime Checker ships an update every 17 months, TeXmemo daily. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Prime Checker | TeXmemo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 95.8% of reviews — better | 66.7% of reviews |
| Number of ratings | 3 — better | — |
| Update frequency | Every 17 months | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 12.4 — better | 14.2 |
| Further details — not scored | ||
| Size | 3 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Heart Solutions, Inc. | Joonha Kwon |
Customer experience
Prime Checker
TeXmemo
In-app purchases
Prime Checker
No in-app purchases
TeXmemo
No in-app purchases
Questions
Is Prime Checker free?
Is TeXmemo free?
Do Prime Checker or TeXmemo have ads?
Which is updated more often, Prime Checker or TeXmemo?
Other comparisons
