# Function Calc vs Tempo Calendar

The clearest difference is update cadence: Tempo Calendar at every 3 days against Function Calc's monthly. Tempo Calendar also leads on review sentiment (100% vs 80%) and device support (3 vs 1). Function Calc's advantage is iOS requirement (18.6 vs 26.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Function Calc against 5.0 for Tempo Calendar. Both are backed by a comparable volume of ratings — 3 and 8 respectively. Written reviews are what separate them: 80% of Function Calc's written reviews are positive against 100% of Tempo Calendar's.

Function Calc ships an update monthly, Tempo Calendar every 3 days. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Function Calc | Tempo Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/function-calc/id1188227053/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/tempo-calendar-daily-planner/id6770082936/reviews) |
| Number of ratings | 3 | **8** |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Free | Free |
| Size | 5 MB | 69 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hugh Pelham](https://appshunter.io/developer/1188227052) | [Rocky Lim](https://appshunter.io/developer/1687860258) |

## What reviewers say

### Function Calc

[App page](https://appshunter.io/ios/app/function-calc/id1188227053)

This app offers a powerful, programmable scientific calculator with graphing capabilities. It allows users to create custom functions, store equations, and perform complex calculations with ease. The interface features a visible tape display and supports dictation for statistical analysis.

**Highlights:** Programmable custom functions, Graphing capabilities, Tape display with edit/undo, Unit conversions (120+), Dictate calculations, Export graphs (PDF, PNG)

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

**In-app purchases:** none


### Tempo Calendar

[App page](https://appshunter.io/ios/app/tempo-calendar-daily-planner/id6770082936)

This app offers a streamlined calendar experience focused on essential features for quick access and readability. It integrates seamlessly with your existing system calendars and syncs automatically across devices.

**Highlights:** Seamless Apple Calendar Integration, Automatic iCloud Sync, Home Screen Monthly Widget, Per-Event Colors, Date Range Highlighting, 30-Day Event Restore, Event Search

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Function Calc free?

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

### Is Tempo Calendar free?

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

### Which has better reviews, Function Calc or Tempo Calendar?

Function Calc and Tempo Calendar are both rated 5.0 out of 5 on the App Store, from 3 and 8 ratings respectively.

### Do Function Calc or Tempo Calendar have ads?

Neither Function Calc nor Tempo Calendar shows ads.

### Which is updated more often, Function Calc or Tempo Calendar?

Function Calc ships an update monthly, and Tempo Calendar every 3 days. Most recently, Function Calc was updated on October 24, 2026 and Tempo Calendar on October 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.*