# MCJ 311 vs IntervalLog

The clearest difference is in-app purchases: MCJ 311 at none against IntervalLog's 2. MCJ 311 also leads on ads (none vs shown) and iOS requirement (12.0 vs 26.0). IntervalLog's advantage is update cadence (every 3 weeks vs every 9 months). On price and device support there is nothing between them.

Both are free to download. IntervalLog sells 2 in-app purchases, starting at $2.99 per month. MCJ 311 asks for nothing beyond the download.

MCJ 311 ships an update every 9 months, IntervalLog every 3 weeks. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | MCJ 311 | IntervalLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Size | 103 MB | 7 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CIVIC SOLUTIONS PRIVATE LIMITED](https://appshunter.io/developer/1095650765) | [BYNET](https://appshunter.io/developer/1811735131) |

## What reviewers say

### MCJ 311

[App page](https://appshunter.io/ios/app/mcj-311/id1575516244)

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

**In-app purchases:** none


### IntervalLog

[App page](https://appshunter.io/ios/app/intervallog-chain-timer/id6772723610)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Yearly | $24.99 | per year |


## Frequently asked questions

### Is MCJ 311 free?

MCJ 311 is free to download, with no in-app purchases.

### Is IntervalLog free?

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

### Do MCJ 311 or IntervalLog have ads?

IntervalLog shows ads; MCJ 311 does not.

### Which is updated more often, MCJ 311 or IntervalLog?

MCJ 311 ships an update every 9 months, and IntervalLog every 3 weeks. Most recently, MCJ 311 was updated on September 30, 2026 and IntervalLog on September 29, 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.*