# Memory Trace vs Shadow Digits

The clearest difference is ads: Memory Trace at none against Shadow Digits's shown. Shadow Digits's advantage is update cadence (every 4 days vs every 9 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Memory Trace ships an update every 9 days, Shadow Digits every 4 days. The most recent releases landed on September 13, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Memory Trace | Shadow Digits |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Every 4 days** |
| Size | 17 MB | 11 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Art Canales](https://appshunter.io/developer/1892981625) | [Stephen Pierce](https://appshunter.io/developer/1895222840) |

## What reviewers say

### Memory Trace

[App page](https://appshunter.io/ios/app/memory-trace/id6762116513)

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

**In-app purchases:** none


### Shadow Digits

[App page](https://appshunter.io/ios/app/shadow-digits/id6763227518)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Memory Trace free?

Memory Trace is free to download, with no in-app purchases.

### Is Shadow Digits free?

Shadow Digits is free to download, with no in-app purchases.

### Do Memory Trace or Shadow Digits have ads?

Shadow Digits shows ads; Memory Trace does not.

### Which is updated more often, Memory Trace or Shadow Digits?

Memory Trace ships an update every 9 days, and Shadow Digits every 4 days. Most recently, Memory Trace was updated on September 13, 2026 and Shadow Digits on September 9, 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.*