Navisizer vs Train4Godliness
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Train4Godliness
This app offers Christians a free platform for spiritual growth. It provides guided daily disciplines, theology courses, and scripture study to foster personal holiness and deepen faith.
- Daily spiritual disciplines
- Foundational theology courses
- Scripture reading guides
- Personal holiness support
- Christian doctrine study
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The Train4Godliness app is a free resource designed to help Christians grow in their faith through daily spiritual disciplines, foundational theology courses, and study resources. It provides guided support for personal holiness, scripture reading, and understanding foundational Christian doctrines.
Screenshots
Verdict
The clearest difference is review sentiment: Train4Godliness at 100% against Navisizer's 13%. Train4Godliness also leads on rating (5.0 vs 2.4) and update cadence (every 10 days vs every 4 months). Navisizer's advantage is ratings volume (26 vs 8). On price, ads, in-app purchases and monetization model 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.
Train4Godliness holds the better App Store score, 5.0 against 2.4. Both are backed by a comparable volume of ratings — 26 and 8 respectively. Written reviews point the same way: 13% of Navisizer's written reviews are positive against 100% of Train4Godliness's.
Navisizer ships an update every 4 months, Train4Godliness every 10 days. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.
| Parameter | Navisizer | Train4Godliness |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (26 ratings) | 5.0 (8 ratings) — better |
| Positive reviews | 12.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 26 — better | 8 |
| Update frequency | Every 4 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.2 | 15.1 — better |
| Further details — not scored | ||
| Size | 21 MB | 44 MB |
| Age rating | 4+ | 12+ |
| Developer | Navien | HUNTER SEAN CHRISTIAN |
Customer experience
Navisizer
Train4Godliness
In-app purchases
Navisizer
No in-app purchases
Train4Godliness
No in-app purchases
Questions
Is Navisizer free?
Is Train4Godliness free?
Which has better reviews, Navisizer or Train4Godliness?
Do Navisizer or Train4Godliness have ads?
Which is updated more often, Navisizer or Train4Godliness?
Other comparisons
