Write a letter vs Rex Time Switch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Write a letter
Create professional letters quickly and easily. Save them as PDFs for emailing, printing, or sharing. Customize your letters with formatting, templates, and fonts to match your style.
- Professional letter creation
- PDF export
- Email, print, and share options
- Customizable templates
- Text formatting
- Signature integration
- Sender address management
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With this app you can write professional letters in just a few minutes. Your letter is saved as a PDF and can be sent by email, printed, or shared via AirDrop at any time. With your signature if you wish. It's that simple: create a sender, enter the recipient, write the letter, done. Design your letters entirely to your own style. The editor supports text formatting such as Bold, Underline and more, so you can highlight important content precisely. Choose between a classic and modern template or create your own letter template with the template generator. Three built-in fonts as well as all fonts installed on your device are available for display. A4 and US Letter are supported. You can save any number of sender addresses, for example private and business, and simply select the right one when writing. Feedback and suggestions for improvement are always welcome. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Rex Time Switch
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With the new and free of charge Rex Time Switch App for mobile devices you can very simply create different time switch programs according to your needs. Thanks to the new BLE (Bluetooth Low Energy) key-adapter already installed digital time-switches can also be programmed with your tablet or smart-phone by using the existing programming key. No PC on-site necessary. Existing programs can be copied, modified and stored on your mobile devices. Installation and programming times are reduced significantly. You get all the programming options you need with a high flexibility. One App for all digital devices with an intuitive, self-explaining interface: get ready for the new Rex Time Switch App!
Screenshots
Verdict
The clearest difference is in-app purchases: Rex Time Switch at none against Write a letter's 3. Rex Time Switch also leads on iOS requirement (10.0 vs 26.0). Write a letter's advantage is update cadence (every 3 months vs every 18 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Write a letter sells 3 in-app purchases, starting at $2.99 per month. Rex Time Switch asks for nothing beyond the download.
Write a letter ships an update every 3 months, Rex Time Switch every 18 months. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.
| Parameter | Write a letter | Rex Time Switch |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (19 ratings) — better | — |
| Positive reviews | 26.4% of reviews | — |
| Number of ratings | 19 — better | — |
| Update frequency | Every 3 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 40 MB | 77 MB |
| Age rating | 4+ | 4+ |
| Developer | Jan-Hendrik Damerau | Legrand |
In-app purchases
Write a letter
- Monthly Premium$2.991 Month
- Annual Premium$22.991 Year
- Lifetime Premium$39.99
Rex Time Switch
No in-app purchases
