# SubZero vs Kalendo

The clearest difference is update cadence: SubZero at every 3 days against Kalendo's every 2 weeks. Kalendo's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. SubZero sells 1 one-off in-app purchase and Kalendo sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

SubZero ships an update every 3 days, Kalendo every 2 weeks. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SubZero | Kalendo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 3 MB | 42 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ADOLPHE Alexandre](https://appshunter.io/developer/6781193691) | [Fatih AYDIN](https://appshunter.io/developer/6790360724) |

## What reviewers say

### SubZero

[App page](https://appshunter.io/ios/app/subzero-subscriptions/id6781193689)

This app helps you track the true cost of your subscriptions, including recurring charges and installment plans. It provides reminders for free trials and upcoming renewals, offering insights into your spending by category and yearly projections. Your data remains private with no account required.

**Highlights:** Automatic monthly and yearly cost calculation, Installment payment tracking, Free trial and renewal reminders, Spending statistics by category, Yearly spending projection, No account required for privacy

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SubZero Pro Lifetime | $3.99 | one-time |


### Kalendo

[App page](https://appshunter.io/ios/app/kalendo-budget-calendar/id6811653357)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium, monthly | $4.99 | per month |
| Premium, yearly | $24.99 | per year |
| Premium, forever | $89.99 | one-time |


## Frequently asked questions

### Is SubZero free?

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

### Is Kalendo free?

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

### Do SubZero or Kalendo have ads?

Neither SubZero nor Kalendo shows ads.

### Which is updated more often, SubZero or Kalendo?

SubZero ships an update every 3 days, and Kalendo every 2 weeks. Most recently, SubZero was updated on October 14, 2026 and Kalendo 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.*