H/Comet Mobile vs PSSI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
H/Comet Mobile
Access and manage crude assay data, slates, blends, and cut sets on the go. Search for assays, modify cut sets, and perform slate operations like comparisons and graphing. Analyze data with value/cut lookup tools.
- Access assay libraries, slates, blends, and cut sets
- Search and view detailed assay data
- Re-cut assays with H/CAMS technology
- Create and modify cut sets
- Access and modify existing or create new slates
- Perform slate operations like cut comparisons and graphing
- Access and modify existing or create new blends
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H/Comet-Mobile by Haverly Systems allows H/Comet customers to access their existing H/Comet assay libraries, slates, blends, and cut sets on the go by logging in with their H/Comet credentials. Users have several search filters they may use to find the perfect assay and view detailed assay data. Assays can be re-cut with H/CAMS technology by editing the gray boiling point fields, or with a saved cut set. Users can also create and modify cut sets (with or without tray inefficiencies). In addition, users can access and modify existing slates or create new ones. Slate operations such as cut comparisons and group graphing can be done on a slate. H/Comet Mobile also supports blends, so users can access (and modify) existing blends as well as create new ones. Finally, assays can be graphed and then analyzed with value/cut lookup tools. Help us improve this app! If you would like to report a bug, suggest a feature, or require customer support pertaining to this app, please email john@haverly.com.
PSSI
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Phase Separation Science is a NELAP accredited full service environmental laboratory located in Baltimore, Maryland specializing in expedited turnaround times. Under the same ownership since 1989, our management cadre and laboratory personnel collectively boast an unparalleled wealth of experience in the domain of quantitative analysis within instrumental chemistry. Our proficiency stands as a benchmark of excellence, reflecting decades of dedicated method refinement.
Screenshots
Verdict
The clearest difference is update cadence: PSSI at every 2 days against H/Comet Mobile's every 3 weeks. H/Comet Mobile's advantage is iOS requirement (9.2 vs 17.0). On price, ads, 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.
H/Comet Mobile ships an update every 3 weeks, PSSI every 2 days. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.
| Parameter | H/Comet Mobile | PSSI |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.2 — better | 17.0 |
| Further details — not scored | ||
| Size | 58 MB | 135 MB |
| Age rating | 4+ | 17+ |
| Developer | Haverly Systems, Inc. | Evan Richardson |
In-app purchases
H/Comet Mobile
No in-app purchases
PSSI
No in-app purchases
