Pipe Calc vs HelloSix.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pipe Calc
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Pipe Calc is a hydraulic pipe network calculator. Select a predefined network, adjust properties and instantly calculate pressures, flow rates, velocities and head losses. AVAILABLE NETWORKS • Pump to elevated tank • Gravity-fed pipeline • Gravity distribution network • Pump to irrigation • Looped network (closed circuit) • Series pumping (booster) • Pump to two tanks • Building pumping (risers and laterals) FREE FEATURES • 8 ready-to-use hydraulic network templates • Edit properties: diameters, lengths, elevations, demands, pump curves • Full hydraulic solver (gradient method) • Color-coded results on the network: pressures, flow rates and velocities • Auto-save changes PRO (one-time purchase) • Export full report for sharing • Add and remove nodes and pipes • Insert node into existing pipe • Parallel pumps • Create custom networks Calculation engine based on the Global Gradient Algorithm (GGA) with the Hazen-Williams equation. Reliable results for both branched and looped networks. Ideal for: → Preliminary design of pumping systems → Quick verification of distribution networks → Hydraulics coursework → Field technicians who need quick calculations
HelloSix.
Discover daily movie recommendations, watch trailers, and explore a comprehensive movie database. Organize your favorites with custom lists. This app is not a streaming service and does not offer full-length movies.
- Daily movie recommendations
- Watch trailers
- Comprehensive movie database
- Organize favorite movies
- View viewing preferences
- No account required
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Features: - Discover movies currently in theaters, upcoming releases, and more - Search for movies - Watch trailers and other related videos - Explore a comprehensive database with detailed information about movies - Gain insights into your viewing preferences through intuitive, visually engaging charts - Create lists to organize your favorite movies - No account required Please Note: This app is not a streaming service. Full-length movies are not available within the app. Sources: - All movie data and images are provided by TMDB under the CC BY-NC 4.0 license: https://creativecommons.org/licenses/by-nc/4.0/ - This product uses the TMDB API but is not endorsed or certified by TMDB: https://www.themoviedb.org/documentation/api/terms-of-use SUBSCRIPTION INFO Payment will be charged to Apple Account at confirmation of purchase Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period Account will be charged for renewal within 24-hours prior to the end of the current period Subscriptions may be managed and auto-renewal may be turned off by going to Account Settings after purchase By using this app, you agree to our Privacy Policy and Terms of Use. Privacy Policy: https://sites.google.com/view/hellosixprivacy Terms of Use: https://sites.google.com/view/hellosixterms
Screenshots
Verdict
The clearest difference is ads: Pipe Calc at none against HelloSix.'s shown. Pipe Calc also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, update cadence 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. Pipe Calc sells 1 one-off in-app purchase and HelloSix. sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Pipe Calc ships an update fortnightly, HelloSix. every 8 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.
| Parameter | Pipe Calc | HelloSix. |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.0 (6 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Fortnightly | Every 8 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 28 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Transparent Blue Water LLC | Roy Labs |
In-app purchases
Pipe Calc
- Pipe Calc Pro$9.99
HelloSix.
- 1 month$4.991 Month
- 1 year$23.991 Year









