# Predictable Deutsch vs ArithmeType

The clearest difference is price: ArithmeType at $9.99 against Predictable Deutsch's $159.99. Predictable Deutsch's advantage is iOS requirement (15.5 vs 17.0). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Predictable Deutsch costs $159.99 and ArithmeType $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Predictable Deutsch ships an update every 2 months, ArithmeType every 5 weeks. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Predictable Deutsch | ArithmeType |
| --- | --- | --- |
| Price | $159.99 | **$9.99** |
| Rating | — | **[3.5 (4 ratings)](https://appshunter.io/ios/app/arithmetype/id6448634447/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 35.7% of reviews | **40.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Paid | Paid |
| Size | 1.7 GB | 8 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Prentke Romich Company](https://appshunter.io/developer/474446992) | [ArithmeType LLC](https://appshunter.io/developer/1684799599) |

## What reviewers say

### Predictable Deutsch

[App page](https://appshunter.io/ios/app/predictable-deutsch/id577387374)

This app assists individuals with communication challenges by offering text-to-speech capabilities. It features intelligent word prediction, customizable phrase organization, and integration with various tools to enhance communication speed and ease.

**Highlights:** Intelligent word prediction, Customizable phrase organization, Multilingual support (43 languages), Multiple access methods, Integration with ChatGPT and drawing tools, Customizable voice settings

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

**In-app purchases:** none


### ArithmeType

[App page](https://appshunter.io/ios/app/arithmetype/id6448634447)

This app provides a specialized keyboard for easily typing mathematical expressions. It simplifies access to symbols from arithmetic to calculus, with features for early learners and accessibility support. It works across various websites and apps.

**Highlights:** Simplified math typing, Easy symbol access, Works with any app, Accessibility support (VoiceOver, Switch Access, Eye Gaze), Removable section covers for learners, Covers arithmetic through calculus

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Predictable Deutsch free?

Predictable Deutsch costs $159.99, with no in-app purchases.

### Is ArithmeType free?

ArithmeType costs $9.99, with no in-app purchases.

### Do Predictable Deutsch or ArithmeType have ads?

Neither Predictable Deutsch nor ArithmeType shows ads.

### Which is updated more often, Predictable Deutsch or ArithmeType?

Predictable Deutsch ships an update every 2 months, and ArithmeType every 5 weeks. Most recently, Predictable Deutsch was updated on September 24, 2026 and ArithmeType on September 21, 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.*