# Calo vs Subscriptions Tracker

The clearest difference is in-app purchases: Calo at none against Subscriptions Tracker's 3. Calo also leads on rating (4.7 vs 4.3) and update cadence (every 5 days vs every 3 weeks). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Subscriptions Tracker sells 3 in-app purchases, starting at $4.99 per month. Calo asks for nothing beyond the download.

Calo holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 20 and 8 respectively. Written reviews complicate that: 94% of Calo's written reviews are positive against 100% of Subscriptions Tracker's, so the app with the better star average is not the one people write more warmly about.

Calo ships an update every 5 days, Subscriptions Tracker every 3 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calo | Subscriptions Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (20 ratings)](https://appshunter.io/ios/app/calo-scientific-calculator/id6670785680/reviews)** | [4.3 (8 ratings)](https://appshunter.io/ios/app/subscriptions-tracker-subio/id6758654066/reviews) |
| Number of ratings | **20** | 8 |
| Positive reviews | 94.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 13 MB | 34 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Space-Time Transformation Technology Co., Ltd.](https://appshunter.io/developer/1296151491) | [Unlock Futurix Ltd](https://appshunter.io/developer/1839751643) |

## What reviewers say

### Calo

[App page](https://appshunter.io/ios/app/calo-scientific-calculator/id6670785680)

This free calculator app offers a clean interface with instant launch and a history feature to view past calculations. It includes customizable themes, keypress sounds, and real-time result display for a smooth user experience.

**Highlights:** Calculation history, Segmented input method, iPad split-screen support, Customizable themes and sounds, Real-time result display, Undo and delete functions

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

**In-app purchases:** none


### Subscriptions Tracker

[App page](https://appshunter.io/ios/app/subscriptions-tracker-subio/id6758654066)

Effortlessly manage all your recurring payments in one place. Get timely reminders before charges, track spending, and organize subscriptions by profile. Automate detection and setup for a clear overview of your financial commitments.

**Highlights:** Track subscription renewals, Receive smart payment reminders, Analyze monthly/yearly spending, Organize with profiles, Share subscription management, Automatic subscription detection, Quick setup with templates

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| premium | $11.99 | per year |
| Subio Lifetime Access | $17.99 | one-time |


## Frequently asked questions

### Is Calo free?

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

### Is Subscriptions Tracker free?

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

### Which has better reviews, Calo or Subscriptions Tracker?

Calo is rated higher. Calo averages 4.7 out of 5 from 20 ratings, while Subscriptions Tracker averages 4.3 from 8 ratings.

### Do Calo or Subscriptions Tracker have ads?

Neither Calo nor Subscriptions Tracker shows ads.

### Which is updated more often, Calo or Subscriptions Tracker?

Calo ships an update every 5 days, and Subscriptions Tracker every 3 weeks. Most recently, Calo was updated on October 28, 2026 and Subscriptions Tracker on October 24, 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.*