NapCat vs calc318
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NapCat
Access and read your favorite GitHub repositories offline on any device. This app offers a powerful code editor and comfortable reading experience with syntax highlighting for over 90 languages. Enjoy your code anywhere, anytime.
- Offline Git client
- Code editor
- Syntax highlighting
- Starred repository access
- Supports 90+ languages
- Customizable themes
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Reading and exploring source code should be enjoyable and not limited to your desktop. NapCat is a GitHub client that lets you download your most-used or favorite projects for offline reading and coding on the go. Features: • Universal: one app for all your devices • Fully offline Git client • Powerful code editor • Private Coding Agent Built-In (*) • Comfortable offline reading with beautiful syntax highlighting • Quick access to starred repositories • Support for 90+ languages and 30 themes, so you can read comfortably in bright sunlight or late at night (**) What users say: "Oh @napcatapp, you're the best discovery I've made all month." -- @davidlesches "The best code reader ever for iOS: NapCat - A GitHub Client" -- @elia "If you're in the market for a free iPhone github code reader, I totally recommend NapCat" — @drewbiewubie "NapCat on iPad is great when you want to offline study something cool on github" — @siuying ----- • Full version: access to all themes • Full version: unlimited offline code storage • Full version: access to private repositories ----- * Agent run locally, only context is sent to LLM ** Access to all themes is available with the Full Version upgrade Terms of Use: https://www.apple.com/legal/itunes/appstore/dev/stdeula
calc318
Instantly solve 175 ACI 318-19 equations with live computation and interactive charts. Understand equation behavior with sensitivity graphs and clear variable descriptions. Designed for engineers needing quick, accurate calculations and insights.
- 175 ACI 318-19 equations solved instantly
- Live computation with unit awareness
- Interactive sensitivity graphs
- Professionally formatted equations
- Complete variable descriptions
- Smart search functionality
- Recents tab for quick access
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Solve all 175 equations from ACI 318-19 Appendix C, instantly, in US Customary Units. Calc318 turns the equations from ACI 318-19 Appendix C into a live calculator. Pick an equation, enter your parameters, and get an answer the moment you type — beautifully rendered, with every variable clearly defined and unit-aware. No spreadsheets, no hand calcs. calc318 requires an auto-renewable subscription. Start your 7-day free trial — no charge until the trial ends, and you can cancel anytime. After the trial, your subscription continues at $12.99/year or $2.99/month. Manage or cancel anytime in Settings → Apple ID → Subscriptions. See more than just a number. Tap any input to open an interactive chart that shows exactly how your result responds as that parameter changes — with a draggable point and a family of curves for the other key variables, so you understand the behavior of the equation, not just one data point. FEATURES: - Live computation for all 175 ACI 318-19 equations, fully unit-aware. - Professionally formatted equations with LaTeX-quality rendering. - Interactive sensitivity graphs — drag a point and watch the result update in real time. - Compare curves across multiple parameter values to see trends at a glance. - Complete variable descriptions and units for every input. - Smart search by section number, chapter, keyword, or variable. - Recents tab to jump back to equations you use most. - Clean, intuitive interface designed for engineers. Whether you're checking a calculation, running a quick sensitivity study, or referencing design provisions, calc318 gets you the answer — and the insight behind it — in seconds. Privacy Policy: https://aiosciv.com/calc318/ Terms of Use (EULA): http://www.apple.com/legal/itunes/appstore/dev/stdeula
Screenshots
Verdict
The clearest difference is rating: calc318 at 5.0 against NapCat's 3.7. calc318 also leads on review sentiment (100% vs 67%). NapCat's advantage is monetization model (free with in-app purchases vs subscription) and ratings volume (7 vs 1). On price, update cadence, ads and in-app purchases 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. NapCat sells 3 in-app purchases, starting at $1.99 per month and calc318 sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
calc318 holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: NapCat has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of NapCat's written reviews are positive against 100% of calc318's.
NapCat ships an update every 4 months, calc318 every 3 months. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.
| Parameter | NapCat | calc318 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (7 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 1 |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.5 — better | 26.0 |
| Further details — not scored | ||
| Size | 156 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Shotdoor | ARTIFICIAL INTELLIGENCE OPTIMIZATION AND SOFTWARE AIOS LLC |
Customer experience
NapCat
calc318
In-app purchases
NapCat
- 1 Month Pro$1.991 Month
- 1 Year Pro$9.991 Year
- NapCat Upgrade$12.99
calc318
- calc318 Pro Monthly7 Days trial$2.991 Month
- calc318 Pro Yearly7 Days trial$12.991 Year









