# Coding Interview vs Voltios

The clearest difference is price: Coding Interview at Free against Voltios's $0.99. Voltios's advantage is ads (none vs shown). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

Coding Interview is free to download; Voltios costs $0.99 up front. Coding Interview sells 2 in-app purchases, starting at $29.99 per month and Voltios sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Coding Interview ships an update weekly, Voltios every 10 days. The most recent releases landed on September 25, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Coding Interview | Voltios |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/voltios-circuit-puzzles/id6779986359/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | — | Paid |
| Size | 100 MB | 7 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Raul Podar](https://appshunter.io/developer/1895632109) | [Ignacio Noguerol Sicilia](https://appshunter.io/developer/6779954213) |

## What reviewers say

### Coding Interview

[App page](https://appshunter.io/ios/app/coding-interview-algo-mind/id6764086152)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AlgoMind Pro Monthly | $29.99 | per month |
| AlgoMind Pro Annual | $89.99 | per year |


### Voltios

[App page](https://appshunter.io/ios/app/voltios-circuit-puzzles/id6779986359)

A puzzle game that teaches the fundamentals of electricity through interactive circuit building. Explore various electrical concepts like switches, short circuits, and Ohm's law in a visually engaging and playful manner. Designed for families with no ads or tracking, offering a complete learning experience with a single purchase.

**Highlights:** Interactive circuit building, Learn electrical concepts visually, Explore switches, fuses, and Ohm's law, 68 levels across 9 worlds, Offline play, No ads or tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game | $4.99 | one-time |


## Frequently asked questions

### Is Coding Interview free?

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

### Is Voltios free?

Voltios costs $0.99, and also offers in-app purchases.

### Do Coding Interview or Voltios have ads?

Coding Interview shows ads; Voltios does not.

### Which is updated more often, Coding Interview or Voltios?

Coding Interview ships an update weekly, and Voltios every 10 days. Most recently, Coding Interview was updated on September 25, 2026 and Voltios on September 30, 2026.

---

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