# Trilight vs Phase Calc

The clearest difference is price: Trilight at Free against Phase Calc's $1.99. Trilight also leads on iOS requirement (13.0 vs 17.0). Phase Calc's advantage is update cadence (every 6 weeks vs every 20 months). On ads, in-app purchases and device support there is nothing between them.

Trilight is free to download; Phase Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trilight ships an update every 20 months, Phase Calc every 6 weeks. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Trilight | Phase Calc |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/phase-calc/id837266300/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 6 weeks** |
| Monetization | — | Paid |
| Size | 5 MB | 13 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oliver Hahn](https://appshunter.io/developer/324458008) | [Donnie Herman](https://appshunter.io/developer/837266303) |

## What reviewers say

### Trilight

[App page](https://appshunter.io/ios/app/trilight-trivice-light/id670194444)

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

**In-app purchases:** none


### Phase Calc

[App page](https://appshunter.io/ios/app/phase-calc/id837266300)

This advanced engineering app performs complex electrical calculations for three-phase power systems. It offers tools for students, technicians, and engineers to analyze unbalanced systems, perform sequence transformations, and access reference libraries. Results can be easily exported for documentation and sharing.

**Highlights:** Symmetrical component analysis, Three-phase power system calculations, Phase-to-sequence and sequence-to-phase transformations, Polar and rectangular input support, Specialized calculators and reference libraries, Exportable results for documentation

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

**In-app purchases:** none


## Frequently asked questions

### Is Trilight free?

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

### Is Phase Calc free?

Phase Calc costs $1.99, with no in-app purchases.

### Do Trilight or Phase Calc have ads?

Neither Trilight nor Phase Calc shows ads.

### Which is updated more often, Trilight or Phase Calc?

Trilight ships an update every 20 months, and Phase Calc every 6 weeks. Most recently, Trilight was updated on October 18, 2026 and Phase Calc on October 15, 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.*