CalmPrime vs Stand Power
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalmPrime
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Have you ever felt anxious, restless, or overwhelmed? Calm yourself — prime numbers will show you the answer. Just one gentle tap, and the primes will guide you through the chaos. With a single touch, CalmPrime leads you into a pure “prime meditation space.” CalmPrime — awaken your Stand and enter the digital world of meditation. prime numbers are solitary numbers that can only be divided by 1 and themselves... they give me strength. — Enrico Pucci Conquer your destiny through the power of primes!
Stand Power
Engage with the JOJO universe through an anime quiz, customize your phone with JOJO-style ringtones, and trigger unique sound effects on your Apple Watch. This app is perfect for fans of JOJO, anime, and manga.
- JOJO Anime Quiz
- JOJO-style Ringtones
- Apple Watch Sound Effects
- Explore JOJO Characters
- Discover Story Backgrounds
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Welcome to the World of JOJO! This app is designed for JOJO, anime, and manga fans. Explore characters, stories, and test your knowledge through a fun JOJO Anime Quiz adventure. Features • JOJO Quiz Game (Anime Quiz) Test your knowledge about the JOJO universe, characters, and storylines. • JOJO Sound Effects on Apple Watch Trigger JOJO-style sound effects on Apple Watch and experience interactive Stand-like abilities. • JOJO Ringtones Customize JOJO-style ringtones for your phone. • Explore the JOJO Universe Discover characters, story backgrounds, and more. Whether you're a hardcore JOJO fan, anime lover, or manga enthusiast, this app is made for you. More exciting features are coming soon. Your JOJO adventure begins now!
Screenshots
Verdict
The clearest difference is in-app purchases: CalmPrime at none against Stand Power's 1. CalmPrime also leads on update cadence (daily vs every 3 weeks). Stand Power's advantage is ads (none vs shown). On price, device support and iOS requirement 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. Stand Power sells 1 one-off in-app purchase. CalmPrime asks for nothing beyond the download.
CalmPrime ships an update daily, Stand Power every 3 weeks. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.
| Parameter | CalmPrime | Stand Power |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.7 (3 ratings) — better |
| Positive reviews | — | 88.9% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Daily — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod, Apple Watch — better |
| Requires iOS | 16 | 15.0 — better |
| Further details — not scored | ||
| Size | 31 MB | 156 MB |
| Age rating | 9+ | 4+ |
| Developer | HUNG-PIN YU | 凯祥 孟 |
In-app purchases
CalmPrime
No in-app purchases
Stand Power
- Lifetime Unlock$1.99
