Carrier eServices vs Navisizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Carrier eServices
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Carrier Commercial Refrigeration webbased monitoring tool for retailers refrigeration system. Management reporting for multiple or single food retailer stores. Providing information according food safety, energy and operation performance.
Navisizer
This app helps size domestic hot water heating systems for residential and commercial use. It calculates operating costs, savings, and generates comprehensive job specifications for Navien NPE Series tankless water heaters.
- Residential system sizing
- Operating cost and savings calculation
- Commercial application sizing (ASHRAE Hunter Curve)
- Tankless and tankless with storage solutions
- Comprehensive job specification output
- Save, print, or email system specs
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NaviSizer is designed to assist with sizing of domestic hot water heating systems with Navien NPE Series tankless water heaters. For residential applications, NaviSizer offers system sizing, calculation of operating cost and savings, and provides a comprehensive output to be used as a job spec. For commercial applications, NaviSizer uses ASHREA Hunter Curve calculations to size a broad range of applications. Both tankless and tankless with storage solutions are offered along with a comprehensive system spec that can be saved, printed, or emailed.
Screenshots
Verdict
The clearest difference is update cadence: Navisizer at every 4 months against Carrier eServices's every 32 months. Carrier eServices's advantage is iOS requirement (8.0 vs 17.2). 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.
Carrier eServices ships an update every 32 months, Navisizer every 4 months. The most recent releases landed on October 19, 2026 and October 22, 2026 respectively.
| Parameter | Carrier eServices | Navisizer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.4 (26 ratings) — better |
| Positive reviews | — | 12.5% of reviews |
| Number of ratings | — | 26 — better |
| Update frequency | Every 32 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 3 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | lise GmbH | Navien |
In-app purchases
Carrier eServices
No in-app purchases
Navisizer
No in-app purchases
Questions
Is Carrier eServices free?
Is Navisizer free?
Do Carrier eServices or Navisizer have ads?
Which is updated more often, Carrier eServices or Navisizer?
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