# Productivity Challenge Timer vs Inextrust Core

The clearest difference is in-app purchases: Inextrust Core at none against Productivity Challenge Timer's 1. Inextrust Core also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Productivity Challenge Timer sells 1 one-off in-app purchase. Inextrust Core asks for nothing beyond the download.

Productivity Challenge Timer ships an update every 3 months, Inextrust Core every 2 months. The most recent releases landed on September 18, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Productivity Challenge Timer | Inextrust Core |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (210 ratings)](https://appshunter.io/ios/app/productivity-challenge-timer/id1117766356/reviews)** | — |
| Number of ratings | **210** | — |
| Positive reviews | 95.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 78 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Vladimir Jovanovic](https://appshunter.io/developer/1117368400) | [INEXTO SA](https://appshunter.io/developer/1530785318) |

## What reviewers say

### Productivity Challenge Timer

[App page](https://appshunter.io/ios/app/productivity-challenge-timer/id1117766356)

This app gamifies productivity by challenging users to work harder and track their habits. Earn ranks, unlock achievements, and monitor your work patterns over time to identify peak productivity periods. It focuses on intense work sessions and detailed time tracking for projects.

**Highlights:** Gamified productivity challenges, Rank and achievement system, Detailed work habit tracking, Project-specific time logging, Focus on uninterrupted work sessions, Productivity analytics by day/hour

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro mode | $8.99 | one-time |

**What reviewers like**

- 🚀 Efficient and reliable
- 👍 Intuitive and user-friendly
- 💡 Gamified approach motivates users
- 📊 Comprehensive statistics and tracking
- 🤖 Snarky and humorous personality

**What reviewers complain about**

- 🔊 Disruptive ads in free version
- 🔔 Overly aggressive notifications
- 🔒 Lack of cloud sync/backup
- 🕰️ Inability to pause or extend sessions

**Reported bugs**

- Occasional sound issues
- Slow loading of historical data
- Inconsistencies between iOS and Android versions

**Requested features**

- Apple Watch support
- Customizable timer durations
- Ability to add notes to sessions
- Weekend/holiday mode to avoid demotions
- More advanced goal-tracking and analytics


### Inextrust Core

[App page](https://appshunter.io/ios/app/inextrust-core/id6476917872)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Productivity Challenge Timer free?

Productivity Challenge Timer is free to download, with in-app purchases available.

### Is Inextrust Core free?

Inextrust Core is free to download, with no in-app purchases.

### Do Productivity Challenge Timer or Inextrust Core have ads?

Neither Productivity Challenge Timer nor Inextrust Core shows ads.

### Which is updated more often, Productivity Challenge Timer or Inextrust Core?

Productivity Challenge Timer ships an update every 3 months, and Inextrust Core every 2 months. Most recently, Productivity Challenge Timer was updated on September 18, 2026 and Inextrust Core on June 1, 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.*