Word Vault vs Sub Zero
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Word Vault
Read full descriptionHide full description
Each theme has 10 levels with 12 word puzzles in each level. Only the first word puzzle in each level corresponds to the level theme. Each solved word earns one gemstone. Ten gemstones earn one hint.
Sub Zero
Explore a collapsing deep-sea base as a lone survivor. Solve intricate puzzles and uncover secrets to save humanity from extinction. Your choices will determine the fate of everyone.
- Retro-futuristic puzzle adventure
- Deep-sea base exploration
- Intricate puzzle solving
- Uncover secrets of Project Abyssus 2
- Story-driven choices
- AI companion guidance
Read full descriptionHide full description
Sub Zero is a retro-futuristic puzzle adventure set in the depths of Earth’s last refuge, Triton 631, a fragile deep-sea base tasked with saving humanity. As a young boy left behind during a critical midnight mission, you awaken to find the base on the brink of collapse. Alone, with only the guidance of the base’s AI, Kibbo, you must explore its deteriorating halls, solve intricate puzzles, and uncover the secrets of Project Abyssus 2, humanity’s desperate attempt to harness geothermal energy. Navigate the haunting remnants of a dying world, piece together the story of the crew, and face choices that could mean salvation—or the end—for everyone.
Screenshots
Verdict
The clearest difference is update cadence: Sub Zero at daily against Word Vault's every 3 days. Sub Zero also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.2). On price, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Word Vault ships an update every 3 days, Sub Zero daily. The most recent releases landed on October 27, 2026 and November 4, 2026 respectively.
| Parameter | Word Vault | Sub Zero |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 days | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.2 | 13.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 360 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Payne | Peter Sandkvist |
In-app purchases
Word Vault
No in-app purchases
Sub Zero
No in-app purchases
