# TVC Summit vs Calculate84

The clearest difference is in-app purchases: TVC Summit at none against Calculate84's 6. TVC Summit also leads on ads (none vs shown) and iOS requirement (11.2 vs 18.0). Calculate84's advantage is update cadence (fortnightly vs every 6 months) and chart position (#111 vs unranked). On price and device support there is nothing between them.

Both are free to download. Calculate84 sells 6 in-app purchases, starting at $2.99 per month. TVC Summit asks for nothing beyond the download.

TVC Summit ships an update every 6 months, Calculate84 fortnightly. The most recent releases landed on October 4, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | TVC Summit | Calculate84 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (54K ratings)](https://appshunter.io/ios/app/calculate84/id1459712793/reviews)** |
| Number of ratings | — | **54K** |
| Positive reviews | — | 74.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | **#111** |
| Size | 12 MB | 71 MB |
| Requires iOS | **11.2** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 12+ |
| Developer | [Roane State Community College](https://appshunter.io/developer/647963311) | [Century Light LLC](https://appshunter.io/developer/1459712792) |

## What reviewers say

### TVC Summit

[App page](https://appshunter.io/ios/app/tvc-summit/id647963288)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculate84

[App page](https://appshunter.io/ios/app/calculate84/id1459712793)

**Currently charting:** #111 Top Free · Education (US App Store)

This app offers a modern graphing calculator experience on your iPhone. It features fast, interactive touch-screen graphing, scrollable windows, and intelligent error messages for a more intuitive user experience. Designed to be a usable alternative to physical graphing calculators.

**Highlights:** Fast, interactive touch-screen graphing, Scrollable windows, Intelligent error messages, Intuitive interface, Designed for TI-84 users

**Features:** Family Sharing, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Subscription | $2.99 | per month |
| Annual Pro Subscription | $6.99 | per year |
| Lifetime Subscription | $6.99 | one-time |
| Lifetime Subscription | $9.99 | one-time |
| Lifetime Subscription | $12.99 | one-time |
| Lifetime Pro Subscription | $29.99 | one-time |

**What reviewers like**

- 👍 Identical to TI-84 calculator
- 🚀 Seamless and intuitive user experience
- 💰 Affordable alternative to physical calculator
- 📱 Convenient to have on phone
- 🔍 Comprehensive functionality matching physical calculator

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🔍 Missing some advanced features like regression types
- 🔒 Previous purchases removed without warning
- 💰 Subscription model can be expensive
- 📺 Intrusive ads in free version

**Reported bugs**

- Crashes when using 2-sample T/Z interval functions
- Incorrect results for inverse trig functions
- Issues with graphing parabolas and tracing points
- Regression equation not displayed correctly

**Requested features**

- Add TVM solver functionality
- Implement more regression types
- Allow disabling of ads for free users
- Restore previous purchase benefits
- Optimize for mobile experience instead of emulating physical calculator


## Frequently asked questions

### Is TVC Summit free?

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

### Is Calculate84 free?

Calculate84 is free to download, with in-app purchases available.

### Do TVC Summit or Calculate84 have ads?

Calculate84 shows ads; TVC Summit does not.

### Which is updated more often, TVC Summit or Calculate84?

TVC Summit ships an update every 6 months, and Calculate84 fortnightly. Most recently, TVC Summit was updated on October 4, 2026 and Calculate84 on October 27, 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.*