# Navisizer vs Train4Godliness

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.

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.

## The numbers

| Metric | Navisizer | Train4Godliness |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (26 ratings)](https://appshunter.io/ios/app/navisizer/id1327385997/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/train4godliness/id6777140009/reviews)** |
| Number of ratings | **26** | 8 |
| Positive reviews | 12.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 21 MB | 44 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Navien](https://appshunter.io/developer/1327385996) | [HUNTER SEAN CHRISTIAN](https://appshunter.io/developer/6775102552) |

## What reviewers say

### Navisizer

[App page](https://appshunter.io/ios/app/navisizer/id1327385997)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Train4Godliness

[App page](https://appshunter.io/ios/app/train4godliness/id6777140009)

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.

**Highlights:** Daily spiritual disciplines, Foundational theology courses, Scripture reading guides, Personal holiness support, Christian doctrine study

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Navisizer free?

Navisizer is free to download, with no in-app purchases.

### Is Train4Godliness free?

Train4Godliness is free to download, with no in-app purchases.

### Which has better reviews, Navisizer or Train4Godliness?

Train4Godliness is rated higher. Navisizer averages 2.4 out of 5 from 26 ratings, while Train4Godliness averages 5.0 from 8 ratings.

### Do Navisizer or Train4Godliness have ads?

Neither Navisizer nor Train4Godliness shows ads.

### Which is updated more often, Navisizer or Train4Godliness?

Navisizer ships an update every 4 months, and Train4Godliness every 10 days. Most recently, Navisizer was updated on October 5, 2026 and Train4Godliness on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*