# The Great Lock vs Problem Logger

The clearest difference is price: The Great Lock at $1.99 against Problem Logger's $9.99. The Great Lock also leads on iOS requirement (15.1 vs 18.6). On ads, in-app purchases and device support there is nothing between them.

The Great Lock costs $1.99 and Problem Logger $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | The Great Lock | Problem Logger |
| --- | --- | --- |
| Price | **$1.99** | $9.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Daily | — |
| Monetization | — | Paid |
| Size | 21 MB | 3 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sohail Hussain](https://appshunter.io/developer/1815090104) | [Thomas Richardson](https://appshunter.io/developer/1887851473) |

## What reviewers say

### The Great Lock

[App page](https://appshunter.io/ios/app/the-great-lock-in/id6752231202)

**Features:** macOS Compatibility

**In-app purchases:** none


### Problem Logger

[App page](https://appshunter.io/ios/app/problem-logger/id6767587409)

Easily log and track recurring issues over time with a private, dated timeline. Ideal for recording symptoms, home repairs, or any situation where knowing when an event occurred is important. Keep your records secure and local on your device.

**Highlights:** Create dated timelines of events, Log incidents in seconds, Set optional reminders, Review timelines over days/weeks/months, Local device storage, App lock for privacy

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

**In-app purchases:** none


## Frequently asked questions

### Is The Great Lock free?

The Great Lock costs $1.99, with no in-app purchases.

### Is Problem Logger free?

Problem Logger costs $9.99, with no in-app purchases.

### Do The Great Lock or Problem Logger have ads?

Neither The Great Lock nor Problem Logger shows ads.

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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.*