# Circuit Cellar vs Habit Diary!

The clearest difference is in-app purchases: Habit Diary! at none against Circuit Cellar's 10. Habit Diary! also leads on update cadence (daily vs every 16 months). Circuit Cellar's advantage is iOS requirement (11.0 vs 13.4). On price, ads and device support there is nothing between them.

Both are free to download. Circuit Cellar sells 10 in-app purchases, starting at $23.99 per year. Habit Diary! asks for nothing beyond the download.

Circuit Cellar ships an update every 16 months, Habit Diary! daily. The most recent releases landed on October 16, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Circuit Cellar | Habit Diary! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/circuit-cellar/id1187533465/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 16 months | **Daily** |
| Monetization | Subscription | — |
| Size | 33 MB | 23 MB |
| Requires iOS | **11.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Magzter Inc.](https://appshunter.io/developer/406791755) | [Adrian Palacios](https://appshunter.io/developer/1638557727) |

## What reviewers say

### Circuit Cellar

[App page](https://appshunter.io/ios/app/circuit-cellar/id1187533465)

Access in-depth engineering tutorials, microcontroller projects, and industry news for electrical engineers and electronics enthusiasts. Explore topics like embedded development, signal processing, and IoT. Subscriptions are available within the app.

**Highlights:** Engineering tutorials, Microcontroller projects, Embedded systems news, Signal processing articles, IoT project guides, Robotics content

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Circuit Cellar 30 | $23.99 | per year |
| Circuit Cellar 1 Year | $34.99 | per year |
| Circuit Cellar - December 2016 | $8.99 | one-time |
| Circuit Cellar - November 2016 | $8.99 | one-time |
| Circuit Cellar - January 2017 | $8.99 | one-time |
| Circuit Cellar - July 2017 | $8.99 | one-time |
| December 2017 | $8.99 | one-time |
| July 2018 | $8.99 | one-time |
| March 2018 | $8.99 | one-time |
| Circuit Cellar November 2018 | $8.99 | one-time |


### Habit Diary!

[App page](https://appshunter.io/ios/app/habit-diary/id6504735205)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Circuit Cellar free?

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

### Is Habit Diary! free?

Habit Diary! is free to download, with no in-app purchases.

### Do Circuit Cellar or Habit Diary! have ads?

Neither Circuit Cellar nor Habit Diary! shows ads.

### Which is updated more often, Circuit Cellar or Habit Diary!?

Circuit Cellar ships an update every 16 months, and Habit Diary! daily. Most recently, Circuit Cellar was updated on October 16, 2026 and Habit Diary! on October 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.*