# Sync Sphere vs Acute Calculator

The clearest difference is in-app purchases: Sync Sphere at none against Acute Calculator's 3. Acute Calculator's advantage is ratings volume (116 vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Acute Calculator sells 3 one-off in-app purchases. Sync Sphere asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Sync Sphere against 4.9 for Acute Calculator. That said, the two scores are not equally well evidenced: Acute Calculator has 116 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on September 14, 2026 and July 16, 2026 respectively.

## The numbers

| Metric | Sync Sphere | Acute Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sync-sphere/id6471382890/reviews)** | [4.9 (116 ratings)](https://appshunter.io/ios/app/acute-calculator/id6476837563/reviews) |
| Number of ratings | 1 | **116** |
| Positive reviews | — | 94.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 44 MB | 16 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Joseph Roskopf](https://appshunter.io/developer/1715208679) | [Find App, Inc.](https://appshunter.io/developer/1666757711) |

## What reviewers say

### Sync Sphere

[App page](https://appshunter.io/ios/app/sync-sphere/id6471382890)

Simplify social event coordination with this app. Create private rooms for gatherings, share codes for easy access, and instantly see everyone's availability to find the perfect time. Enjoy a user-friendly, cross-platform experience designed for effortless planning.

**Highlights:** Personalized planning rooms for events, Simple room code sharing for guests, View group availability at a glance, User-friendly interface, Cross-platform accessibility, Invite-only rooms for privacy

**Features:** macOS Compatibility

**In-app purchases:** none


### Acute Calculator

[App page](https://appshunter.io/ios/app/acute-calculator/id6476837563)

This advanced graphing calculator offers a visual editor and supports over 30 functions. It includes features like a history tape, variable storage, and an intuitive palette system for complex calculations.

**Highlights:** Visual editor, 30+ functions supported, History tape, Store variables, Intuitive palette system

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Acute Plus Limited-Time Offer | $3.49 | one-time |
| Acute Plus (For Students) | $4.99 | one-time |
| Acute Plus (One Time) | $6.99 | one-time |


## Frequently asked questions

### Is Sync Sphere free?

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

### Is Acute Calculator free?

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

### Which has better reviews, Sync Sphere or Acute Calculator?

Sync Sphere is rated higher. Sync Sphere averages 5.0 out of 5 from 1 ratings, while Acute Calculator averages 4.9 from 116 ratings.

### Do Sync Sphere or Acute Calculator have ads?

Neither Sync Sphere nor Acute Calculator shows ads.

### Which is updated more often, Sync Sphere or Acute Calculator?

Sync Sphere ships an update every 2 days, and Acute Calculator every 2 days. Most recently, Sync Sphere was updated on September 14, 2026 and Acute Calculator on July 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*