# ID16100 vs HattiWatt

The clearest difference is update cadence: HattiWatt at every 3 weeks against ID16100's every 3 months. 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.

ID16100 ships an update every 3 months, HattiWatt every 3 weeks. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | ID16100 | HattiWatt |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 11 MB | 2 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Suomen 16100 Oy](https://appshunter.io/developer/877690740) | [Pramell Oy](https://appshunter.io/developer/1581797918) |

## What reviewers say

### ID16100

[App page](https://appshunter.io/ios/app/id16100/id1469044778)

**Features:** macOS Compatibility

**In-app purchases:** none


### HattiWatt

[App page](https://appshunter.io/ios/app/hattiwatt/id6443710171)

**In-app purchases:** none


## Frequently asked questions

### Is ID16100 free?

ID16100 is free to download, with no in-app purchases.

### Is HattiWatt free?

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

### Do ID16100 or HattiWatt have ads?

Neither ID16100 nor HattiWatt shows ads.

### Which is updated more often, ID16100 or HattiWatt?

ID16100 ships an update every 3 months, and HattiWatt every 3 weeks. Most recently, ID16100 was updated on September 8, 2026 and HattiWatt 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.*