SolidGuide vs e
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SolidGuide
This app provides water treatment professionals with quick access to product information and essential calculators for cooling tower, boiler, and closed-loop systems. It features a user-friendly catalog, equipment details, intelligent surveys, and searchable resources like spec sheets and drawings.
- User-friendly product catalog
- Comprehensive equipment information
- Intelligent surveys
- Upgraded calculators
- Searchable resources (spec sheets, drawings, case studies)
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SolidGuide, powered by AP Tech, is a valuable resource for water treatment professionals, designed to streamline access to AP Tech solid chemistry product information and calculators for cooling tower, boiler, and closed-loop applications. With SolidGuide 2.0, you will experience a smooth experience and refined resources, including: • User-friendly Product Catalog • Comprehensive equipment information • Intelligent and seamless surveys • Calculators with upgraded functionality • Searchable resources (spec sheets, drawings, case studies, and more) • Eliminate the guesswork and get SolidGuide.
e
This tool allows water quality professionals to collect, manage, analyze, and track water quality test parameters. It is designed for water treatment facilities and professionals in the field.
- Water quality data collection
- Data management
- Analysis of test parameters
- Tracking of water quality
- Designed for professionals
- Supports water treatment facilities
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The e-sens ROAM app is a free water quality collection tool to gather, manage, analyze and track all your water quality test parameters. Built for Water quality professionals and water treatment facilities.
Screenshots
Verdict
The clearest difference is monetization model: SolidGuide at free against e's ad-supported. On price, rating, ratings volume and update cadence 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.
On the App Store both sit at effectively the same score — 5.0 for SolidGuide against 5.0 for e. Both are backed by a comparable volume of ratings — 3 and 3 respectively.
SolidGuide ships an update every 6 weeks, e every 2 months. The most recent releases landed on June 5, 2026 and September 19, 2026 respectively.
| Parameter | SolidGuide | e |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (3 ratings) |
| Number of ratings | 3 | 3 |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 3 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | APTech Group | e-sens, Inc. |
Customer experience
SolidGuide
e
In-app purchases
SolidGuide
No in-app purchases
e
No in-app purchases
