Comparison

HydroCloud vs Castly

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

HydroCloud

Features
Read full description

HydroCloud is an efficient community management tool built exclusively for water vending machine operators, designed to enhance management efficiency and business operations.

About

Castly

Features
Read full description

Give every character a voice. Turn your own EPUB, PDF, and TXT ebooks into audiobooks with Castly. AI identifies characters in your story and assigns different voices to narration and dialogue, making it easier to follow who is speaking. YOUR BOOKS, READY TO LISTEN Import a novel or ebook, check its chapters, and start listening. Keep your books together in your library and make time for a story on your commute, on a walk, or before bed. CHOOSE A VOICE FOR EACH CHARACTER Give the narrator and characters their own voices. Preview and choose voices to match the people you imagine, then adjust the assignments to suit your story. READ ALONG AND PICK UP WHERE YOU LEFT OFF Follow the text while the audio plays, set a comfortable playback speed, and continue from your last listening position when you return. BACKGROUND PLAYBACK AND SLEEP TIMER Keep listening while using other apps. Set a sleep timer or stop playback after a selected chapter. TRY A STORY BEFORE IMPORTING YOUR OWN Sign in to try a built-in, three-chapter sample story and experience multi-character narration before adding your own ebooks. CASTLY PRO Some character voice features require Castly Pro. Check the available plans, prices, and included features in the app before subscribing. Supports EPUB, PDF, and TXT files. PDFs must contain extractable text. Privacy Policy: https://fit.slothease.com/en/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

HydroCloud4 screens
Castly4 screens

Verdict

The call

The clearest difference is in-app purchases: HydroCloud at none against Castly's 2. HydroCloud also leads on iOS requirement (15.0 vs 18.0). Castly's advantage is update cadence (weekly vs monthly). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Castly sells 2 in-app purchases, starting at $9.99 per month. HydroCloud asks for nothing beyond the download.

UpkeepUpdate frequency

HydroCloud ships an update monthly, Castly weekly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Β· 3 level
HydroCloud versus Castly: the parameters behind the verdict, then further details
ParameterHydroCloudCastly
PriceFreeFree
Update frequencyMonthlyWeekly β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 β€” better18.0
Further details β€” not scored
Size44 MB29 MB
Age rating4+12+
DeveloperBeijing Heipitai Technology Co., LtdSlothEase

In-app purchases

None

HydroCloud

No in-app purchases

2 purchases

Castly

Subscriptions2
  • Castly Pro Monthly$9.991 Month
  • Castly Pro Annual$49.991 Year

Questions

Is HydroCloud free?
HydroCloud is free to download, with no in-app purchases.
Is Castly free?
Castly is free to download, with in-app purchases available.
Do HydroCloud or Castly have ads?
Neither HydroCloud nor Castly shows ads.
Which is updated more often, HydroCloud or Castly?
HydroCloud ships an update monthly, and Castly weekly. Most recently, HydroCloud was updated on October 28, 2026 and Castly on October 31, 2026.

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