Comparison

Deep Space vs Crystal Guard

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Deep Space

Engage in thrilling air combat combined with strategic tower defense. Equip your aircraft with various weapons and strategically place them to achieve different combat effects. Simple touch controls allow for easy aircraft movement.

Highlights
  • Air combat gameplay
  • Tower defense strategy
  • Weapon customization
  • Strategic placement
  • Simple touch controls
Features
Read full description

Deep Space is a game that combines air combat with tower defense. Players need to decide and choose which weapons to equip, as well as the position of the placement, pay attention to different combinations, and the different placement effects are completely different. The operation is very simple, press and hold the left or right side of the screen to control the movement of the aircraft.

About

Crystal Guard

Defend a fragile crystal from waves of monsters in this unique Roguelite tower defense game. Strategically build mazes with blocks and develop powerful turrets to resist attacks. Adapt your tactics to collect crystals and secure victory.

Highlights
  • Roguelite gameplay
  • Block puzzle maze creation
  • Strategic tower defense
  • Turret development
  • Unique art style
  • Casual puzzle elements
Features
Read full description

In this unique Roguelite tower defense game, you play as the guardian of the Amethyst, responsible for protecting the fragile crystal from being destroyed by monsters. During the adventure, choose your favorite combination from unique turrets to cultivate, and use blocks of different shapes to create a maze to resist waves of attacks. Keep building, strengthening, and adjusting strategies until you successfully collect crystals and return to the kingdom. - Game Features - Roguelite gameplay Classic block puzzle game Strategic Tower Defense Turret development Unique art style Casual and puzzle elements [Instructions for automatic subscription service] 1.Subscription service: a) Remove All Ads For 30 Days (1 month) 2. Subscription price: a) Remove All Ads For 30 Days: the continuous monthly subscription product is US$4.99/month 3. Payment: After the user confirms the purchase and makes the payment, it will be credited to the iTunes account 4. Automatic renewal: Apple's iTunes account will be deducted within 24 hours before expiration. After the deduction is successful, the subscription period will be extended by one subscription period. 5. Turn off the service: You can go to "Settings" on your Apple phone --> Enter "iTunes Store and App Store" --> Click "Apple ID", select "View Apple ID", enter the "Account Settings" page, and click "Subscribe" ", manages automatic subscription services. If you need to cancel, just close it 24 hours before the end of each billing cycle. No fees will be deducted within 24 hours before expiration. 6. Service Agreement:  https://docs.google.com/document/d/1HykzvxBclFK7aQm6PJmzIou8KlxNzPXfVznTygZWRlg/edit?usp=sharing 7. Privacy Agreement:  https://docs.google.com/document/d/1BqE04-K6hoRCTml9yvIhl-SfUgRZY2dm-JDP7rgbuG4/edit?usp=sharing

Screenshots

Deep Space4 screens
Crystal Guard4 screens

Verdict

The call

The clearest difference is review sentiment: Crystal Guard at 100% against Deep Space's 50%. Crystal Guard also leads on update cadence (every 2 days vs every 23 months). Deep Space's advantage is rating (5.0 vs 3.0) and in-app purchases (none vs 10). On price, ratings volume, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Crystal Guard sells 10 in-app purchases, starting at $4.99 per month. Deep Space asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Deep Space holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews complicate that: 50% of Deep Space's written reviews are positive against 100% of Crystal Guard's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Deep Space ships an update every 23 months, Crystal Guard every 2 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
Deep Space versus Crystal Guard: the parameters behind the verdict, then further details
ParameterDeep SpaceCrystal Guard
PriceFreeFree
Rating5.0 (2 ratings) — better3.0 (1 ratings)
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings2 — better1
Update frequencyEvery 23 monthsEvery 2 days — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better11.0
Further details — not scored
Size192 MB283 MB
Age rating4+17+
DeveloperWingjoy Games Co., Ltd艳 王

Customer experience

Deep Space

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Crystal Guard

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Deep Space

No in-app purchases

10 purchases

Crystal Guard

Subscriptions1
  • Remove All Ads For 30 Days$4.991 Month
One-time9
  • Newcomer pack$0.99
  • 10 advertising coupons$1.99
  • 30 advertising coupons$3.99
Show 6 more
  • Turret pack$3.99
  • Turret upgrade pack$5.99
  • Golden battle pass$6.99
  • 3000 Diamonds$7.99
  • 70 advertising coupons$7.99
  • Remove advertisements$19.99

Questions

Is Deep Space free?
Deep Space is free to download, with no in-app purchases.
Is Crystal Guard free?
Crystal Guard is free to download, with in-app purchases available.
Which has better reviews, Deep Space or Crystal Guard?
Deep Space is rated higher. Deep Space averages 5.0 out of 5 from 2 ratings, while Crystal Guard averages 3.0 from 1 ratings.
Do Deep Space or Crystal Guard have ads?
Both Deep Space and Crystal Guard show ads.
Which is updated more often, Deep Space or Crystal Guard?
Deep Space ships an update every 23 months, and Crystal Guard every 2 days. Most recently, Deep Space was updated on November 3, 2026 and Crystal Guard on November 4, 2026.

Other comparisons