# Acid Base Salt Practice vs Spaced.

The clearest difference is in-app purchases: Acid Base Salt Practice at none against Spaced.'s 2. Acid Base Salt Practice also leads on iOS requirement (13.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Spaced. sells 2 one-off in-app purchases. Acid Base Salt Practice asks for nothing beyond the download.

## The numbers

| Metric | Acid Base Salt Practice | Spaced. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spaced/id6762540303/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 months |
| Monetization | — | Free |
| Size | 27 MB | 6 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Manish Kumar](https://appshunter.io/developer/1854995154) | [Clement Boissiere](https://appshunter.io/developer/1696386692) |

## What reviewers say

### Acid Base Salt Practice

[App page](https://appshunter.io/ios/app/acid-base-salt-practice/id6759965636)

**Features:** macOS Compatibility

**In-app purchases:** none


### Spaced.

[App page](https://appshunter.io/ios/app/spaced/id6762540303)

This minimalist flashcard app helps you remember information through spaced repetition. Create custom decks with text, images, or audio, and review efficiently by focusing on what you need to learn. It's designed for privacy with no ads or tracking.

**Highlights:** Spaced repetition learning, Customizable decks, Text, image, and audio cards, AI-assisted deck creation, Starter decks included, Private by design, no ads or tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |


## Frequently asked questions

### Is Acid Base Salt Practice free?

Acid Base Salt Practice is free to download, with no in-app purchases.

### Is Spaced. free?

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

### Do Acid Base Salt Practice or Spaced. have ads?

Neither Acid Base Salt Practice nor Spaced. shows ads.

---

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