# Telecommunication Dictionary vs Signals and Systems

The clearest difference is in-app purchases: Telecommunication Dictionary at none against Signals and Systems's 6. Telecommunication Dictionary also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). Signals and Systems's advantage is ads (none vs shown). On price there is nothing between them.

Both are free to download. Signals and Systems sells 6 in-app purchases, starting at $9.99 per month. Telecommunication Dictionary asks for nothing beyond the download.

## The numbers

| Metric | Telecommunication Dictionary | Signals and Systems |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Every 5 weeks |
| Size | 99 MB | 18 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Raj Mehta](https://appshunter.io/developer/1714953061) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### Telecommunication Dictionary

[App page](https://appshunter.io/ios/app/telecommunication-dictionary/id6477773357)

**Features:** macOS Compatibility

**In-app purchases:** none


### Signals and Systems

[App page](https://appshunter.io/ios/app/signals-and-systems/id6739804680)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


## Frequently asked questions

### Is Telecommunication Dictionary free?

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

### Is Signals and Systems free?

Signals and Systems is free to download, with in-app purchases available.

### Do Telecommunication Dictionary or Signals and Systems have ads?

Telecommunication Dictionary shows ads; Signals and Systems does not.

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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.*