# Salad Card Decks vs Engineering Formulas

The clearest difference is iOS requirement: Salad Card Decks at 12.0 against Engineering Formulas's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Salad Card Decks sells 8 one-off in-app purchases and Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Salad Card Decks | Engineering Formulas |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 32.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 45 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Salad Seminars](https://appshunter.io/developer/587820520) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### Salad Card Decks

[App page](https://appshunter.io/ios/app/salad-card-decks/id587820517)

Explore digital versions of popular coaching card decks, including Ericksonian Hypnosis and NLP. This free app offers sample cards and the option to purchase full decks or bundles for in-depth learning and application.

**Highlights:** Sample cards from popular coaching decks, Digital versions of Ericksonian Hypnosis cards, Digital versions of NLP Coaching cards, In-app purchases for full decks, Bundle purchase options for multiple decks

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Instant Happiness - Full Deck | $9.99 | one-time |
| Instant Wealth - Full Deck | $9.99 | one-time |
| NLP Belief Buster - Full Deck | $19.99 | one-time |
| NLP Coaching Cards - Full Deck | $19.99 | one-time |
| FULL Irresistible Influence | $19.99 | one-time |
| Ericksonian Hypnosis - Full Deck | $19.99 | one-time |
| The Language Bundle | $59.99 | one-time |
| 6 Deck Bundle | $79.99 | one-time |


### Engineering Formulas

[App page](https://appshunter.io/ios/app/engineering-formulas-engiref/id6758258119)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Yearly Premium | $29.99 | per year |
| Lifetime Access | $54.99 | one-time |


## Frequently asked questions

### Is Salad Card Decks free?

Salad Card Decks is free to download, with in-app purchases available.

### Is Engineering Formulas free?

Engineering Formulas is free to download, with in-app purchases available.

### Do Salad Card Decks or Engineering Formulas have ads?

Neither Salad Card Decks nor Engineering Formulas shows ads.

### Which is updated more often, Salad Card Decks or Engineering Formulas?

Salad Card Decks ships an update every 2 months, and Engineering Formulas every 2 months. Most recently, Salad Card Decks was updated on November 1, 2026 and Engineering Formulas on November 3, 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.*