# Big Day vs Terrarium Tracker

The clearest difference is review sentiment: Big Day at 71% against Terrarium Tracker's 0%. Big Day also leads on rating (4.0 vs 3.7) and ratings volume (81 vs 3). Terrarium Tracker's advantage is price (Free vs $3.99) and update cadence (every 5 days vs every 5 weeks). On ads, in-app purchases, monetization model and device support there is nothing between them.

Terrarium Tracker is free to download; Big Day costs $3.99 up front. Big Day sells 9 one-off in-app purchases and Terrarium Tracker sells 7 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Big Day holds the better App Store score, 4.0 against 3.7. That said, the two scores are not equally well evidenced: Big Day has 81 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 71% of Big Day's written reviews are positive against 0% of Terrarium Tracker's.

Big Day ships an update every 5 weeks, Terrarium Tracker every 5 days. The most recent releases landed on November 13, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Big Day | Terrarium Tracker |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.0 (81 ratings)](https://appshunter.io/ios/app/big-dayevent-countdown-clock/id581481166/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/terrarium-tracker/id6752220718/reviews) |
| Number of ratings | **81** | 3 |
| Positive reviews | **70.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 35 MB | 91 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WW Productions BVBA](https://appshunter.io/developer/1171837096) | [ADRIAN WRONA](https://appshunter.io/developer/1838303154) |

## What reviewers say

### Big Day

[App page](https://appshunter.io/ios/app/big-dayevent-countdown-clock/id581481166)

This app helps you track the time until important life events with customizable countdowns. It offers detailed timers, personalized visuals, and repeating alerts to enhance anticipation for holidays, anniversaries, and more.

**Highlights:** Comprehensive event countdowns, Hour, minute, and second timer, Customizable background visuals, Personalized countdown timer, Repeating and multiple alerts, Social sharing of events, Unlimited event tracking

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| package of 32 different Anniversaries background images | $1.99 | one-time |
| package of 32 different Holidays background images | $1.99 | one-time |
| package of 32 different Parties background images | $1.99 | one-time |
| package of 32 different Events background images | $1.99 | one-time |
| package of 32 different Celebrations background images | $1.99 | one-time |
| package of 32 different Yearly background images | $1.99 | one-time |
| package of 32 different Career background images | $1.99 | one-time |
| package of 32 different Personal background images | $1.99 | one-time |
| All background images | $9.99 | one-time |

**What reviewers like**

- 💡 Customizable with own photos
- 👍 Easy to use
- 🚀 Accurate countdown
- 👍 Helpful for visualizing time
- 👍 Multiple events supported

**What reviewers complain about**

- 🐛 Crashes and freezes on some devices
- 💰 In-app purchases required for more features
- 🔧 Occasional issues with time/date accuracy
- 🔧 Background image resizing not possible

**Reported bugs**

- Countdown time not always accurate
- Inability to restore purchased content
- Compatibility issues with newer iOS versions

**Requested features**

- Ability to set recurring events
- Widget support for home screen
- More free background image options
- Countdown alerts/notifications


### Terrarium Tracker

[App page](https://appshunter.io/ios/app/terrarium-tracker/id6752220718)

Log feeding, molting, and health for exotic pets like spiders and reptiles. Set reminders, track environmental conditions, and generate care journals. Monitor multiple terrariums and access a community for advice.

**Highlights:** Detailed animal profiles, Care task logging (feeding, molting, cleaning), Health and environmental notes, Customizable reminders, Printable care journals, Enclosure volume calculator, Keeper community forum

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Premium – Monthly | $1.99 | per month |
| Upgrade to Premium – Yearly | $6.99 | per year |
| Give Support 1 | $0.99 | one-time |
| Give Support 2 | $1.99 | one-time |
| Give Support 3 | $4.99 | one-time |
| Give Support 4 | $9.99 | one-time |
| Premium Upgrade | $9.99 | one-time |


## Frequently asked questions

### Is Big Day free?

Big Day costs $3.99, and also offers in-app purchases.

### Is Terrarium Tracker free?

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

### Which has better reviews, Big Day or Terrarium Tracker?

Big Day is rated higher. Big Day averages 4.0 out of 5 from 81 ratings, while Terrarium Tracker averages 3.7 from 3 ratings.

### Do Big Day or Terrarium Tracker have ads?

Neither Big Day nor Terrarium Tracker shows ads.

### Which is updated more often, Big Day or Terrarium Tracker?

Big Day ships an update every 5 weeks, and Terrarium Tracker every 5 days. Most recently, Big Day was updated on November 13, 2026 and Terrarium Tracker on October 30, 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.*