# Deflection vs IDYL PM

The clearest difference is price: IDYL PM at Free against Deflection's $4.99. Deflection's advantage is update cadence (every 6 weeks vs every 8 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

IDYL PM is free to download; Deflection costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Deflection ships an update every 6 weeks, IDYL PM every 8 months. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Deflection | IDYL PM |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.6 (115 ratings)](https://appshunter.io/ios/app/deflection/id670400597/reviews)** | — |
| Number of ratings | **115** | — |
| Positive reviews | 73.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 8 months |
| Monetization | Paid | — |
| Size | 160 MB | 14 MB |
| Requires iOS | **15.0** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Blue Ketchep](https://appshunter.io/developer/1131834248) | [Productivity Associates](https://appshunter.io/developer/1492861795) |

## What reviewers say

### Deflection

[App page](https://appshunter.io/ios/app/deflection/id670400597)

Calculate structural behavior for beams, 2D trusses, and 2D frames. Visualize reaction forces, shear, bending moment, and deflection. Analyze internal stresses along the beam and cross-section.

**Highlights:** Beam, 2D truss, and 2D frame analysis, Graphical output of results, Internal shear and bending stress calculation, 2D frame and truss editor, Cross-section editor with automatic calculations, Built-in database and quick-start templates

**Features:** Vision Pro support

**In-app purchases:** none


### IDYL PM

[App page](https://appshunter.io/ios/app/idyl-pm/id1494667851)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Deflection free?

Deflection costs $4.99, with no in-app purchases.

### Is IDYL PM free?

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

### Do Deflection or IDYL PM have ads?

Neither Deflection nor IDYL PM shows ads.

### Which is updated more often, Deflection or IDYL PM?

Deflection ships an update every 6 weeks, and IDYL PM every 8 months. Most recently, Deflection was updated on October 29, 2026 and IDYL PM on October 26, 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.*