# Seismic Mike vs Doc Diary

The clearest difference is update cadence: Doc Diary at every 3 months against Seismic Mike's every 9 months. Doc Diary also leads on iOS requirement (11.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Seismic Mike ships an update every 9 months, Doc Diary every 3 months. The most recent releases landed on October 4, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Seismic Mike | Doc Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/seismic-mike/id590511123/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 10 MB | 45 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [xcentric systems](https://appshunter.io/developer/334272055) | [Ficode](https://appshunter.io/developer/1504109839) |

## What reviewers say

### Seismic Mike

[App page](https://appshunter.io/ios/app/seismic-mike/id590511123)

Explore global earthquake activity with a playful approach to scientific data. See how active our planet is with daily updates on seismic events worldwide. Stay informed about the Earth's movements.

**Highlights:** Global earthquake feed visualization, Daily seismic activity updates, Whimsical data presentation, Planet activity monitoring, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Doc Diary

[App page](https://appshunter.io/ios/app/doc-diary/id1530768543)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Seismic Mike free?

Seismic Mike is free to download, with no in-app purchases.

### Is Doc Diary free?

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

### Do Seismic Mike or Doc Diary have ads?

Neither Seismic Mike nor Doc Diary shows ads.

### Which is updated more often, Seismic Mike or Doc Diary?

Seismic Mike ships an update every 9 months, and Doc Diary every 3 months. Most recently, Seismic Mike was updated on October 4, 2026 and Doc Diary on September 27, 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.*