# Bellows Design Software vs SpamLess

The clearest difference is in-app purchases: SpamLess at none against Bellows Design Software's 2. SpamLess also leads on update cadence (fortnightly vs monthly). Bellows Design Software's advantage is device support (3 vs 1) and iOS requirement (16.0 vs 18.0). On price and ads there is nothing between them.

Both are free to download. Bellows Design Software sells 2 in-app purchases, starting at $34.99 per month. SpamLess asks for nothing beyond the download.

Bellows Design Software ships an update monthly, SpamLess fortnightly. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Bellows Design Software | SpamLess |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bellows-design-software/id1635945221/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 40 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Santarelli Apps, LLC](https://appshunter.io/developer/1703488409) |

## What reviewers say

### Bellows Design Software

[App page](https://appshunter.io/ios/app/bellows-design-software/id1635945221)

This application assists in designing metallic bellows type expansion joints according to EJMA Standards. It allows users to input various design parameters and movement inputs to ensure safe and reliable usage. The software performs comprehensive calculations and checks against EJMA conditions for different bellows configurations and materials.

**Highlights:** Design metallic bellows expansion joints, Input internal diameter, convolution height, ply thickness, pitch, and number of plies, Set design pressure, temperature, and movements, Check design parameters against EJMA Standards, Calculations for single and dual bellows, Includes vibration and bellows forming methods, Calculations for tie rods, lugs plate, and hinges

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access for Bellows | $34.99 | per month |
| All Access for Bellows Design | $299.99 | per year |


### SpamLess

[App page](https://appshunter.io/ios/app/spamless/id6741089486)

**In-app purchases:** none


## Frequently asked questions

### Is Bellows Design Software free?

Bellows Design Software is free to download, with in-app purchases available.

### Is SpamLess free?

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

### Do Bellows Design Software or SpamLess have ads?

Neither Bellows Design Software nor SpamLess shows ads.

### Which is updated more often, Bellows Design Software or SpamLess?

Bellows Design Software ships an update monthly, and SpamLess fortnightly. Most recently, Bellows Design Software was updated on October 2, 2026 and SpamLess 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.*