# Focus Timer vs Calc

The clearest difference is in-app purchases: Calc at none against Focus Timer's 4. Calc also leads on iOS requirement (18.0 vs 26.0). Focus Timer's advantage is update cadence (every 5 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Focus Timer sells 4 in-app purchases, starting at $2.99 per 7 days. Calc asks for nothing beyond the download.

Focus Timer ships an update every 5 days, Calc fortnightly. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Focus Timer | Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calc-u-59/id6761413142/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | — | Free |
| Size | 10 MB | 9 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, Mac | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pentarab](https://appshunter.io/developer/1453947051) | [Martin Erzberger](https://appshunter.io/developer/1889469770) |

## What reviewers say

### Focus Timer

[App page](https://appshunter.io/ios/app/focus-timer-focusmind/id6754965226)

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $2.99 | per 7 days |
| FocusMind Premium (Monthly) | $4.99 | per month |
| FocusMind Premium (Yearly) | $29.99 | per year |
| FocusMind Premium (Lifetime) | $39.99 | one-time |


### Calc

[App page](https://appshunter.io/ios/app/calc-u-59/id6761413142)

Explore the inner workings of classic TI-59, TI-58, and TI-58C calculators. This tool offers cycle-accurate emulation, a debugger to inspect code and registers, and a functional paper tape printer recreation. Load and save programs using magnetic card emulation and state files.

**Highlights:** Cycle-accurate TMC0501 processor emulation, Integrated debugger for program and register inspection, Functional PC-100C paper tape printer recreation, Magnetic card reader for loading/saving programs, State file loading for instant machine configuration, Solid State Module support

**In-app purchases:** none


## Frequently asked questions

### Is Focus Timer free?

Focus Timer is free to download, with in-app purchases available.

### Is Calc free?

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

### Do Focus Timer or Calc have ads?

Neither Focus Timer nor Calc shows ads.

### Which is updated more often, Focus Timer or Calc?

Focus Timer ships an update every 5 days, and Calc fortnightly. Most recently, Focus Timer was updated on October 9, 2026 and Calc on September 30, 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.*