Comparison

AstroShader vs Keptt

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

Head to head
About

AstroShader

Capture, stack, and edit stunning astrophotography directly on your mobile device. This app streamlines the process by aligning and stacking images live during capture, eliminating the need for external software. Fine-tune your celestial images with a comprehensive suite of editing tools.

Highlights
  • Live image alignment and stacking
  • Manual focus control
  • Adjustable exposure, ISO, and white balance
  • Intervalometer for timed captures
  • Advanced image editing tools
  • Save in multiple formats including TIFF
Read full description

One-time purchase. No subscription. AstroShader is an astrophotography app for capturing, stacking and editing. All you need is a stand, tripod, telescope or rock (to lean your phone on). AstroShader lets you align and stack live during the image capture process. You can also align and stack images from you Photos library. No need to transfer images to a computer to align and stack them separately (but there is a built in intervalometer if you need it). To take an image follow these steps: • Use a stand, tripod, telescope mount (or lean your iPhone on a rock). • Zoom in on stars and set focus manually, or use autofocus. • Set the exposure time, ISO and white balance, or leave to auto-exposure. • Set the number of exposures to be automatically aligned and stacked. • Calibrate your images from the edit tools. • After the capture is complete you can edit and save your image—including as 16bit TIFF. • You can open images directly to use the edit tools in AstroShader - rather following a new image capture. Image capture options include: • Number of exposures to be aligned and stacked • Exposure time • ISO • White balance • Camera type • Countdown timer • Manual focus • Pause the capture to reposition iPhone or telescope Edit options include: • Stretch image • Background extraction • Dynamic background extraction (DBE) • x5 Histogram curves for fine tonal adjustment • x3 sharpen layers each with radius and intensity with layer blending rather than chaining • Brightness (low light enhancement) • Saturation • Black point • Temperature • Tint • Save format options; HEIF, PNG, JPEG, TIFF

About

Keptt

Easily create a shared album for any event, from parties to trips. Invite friends to contribute photos and videos in real-time, ensuring all memories are kept together in one collective gallery. Features include event mapping, on-site photo submission, and host moderation for a private and organized experience.

Highlights
  • Create shared event galleries
  • Real-time photo and video contributions
  • Invite guests via link or QR code
  • Pin events on a map
  • On-site mode for authentic galleries
  • Host photo approval
  • Private by default with deletion options
Features
Read full description

Keptt is the shared photo gallery for your events. Start a space for any occasion: a party, an event, a wedding, a trip, a night out - and everyone who's there adds their photos and videos to one collective gallery. No more begging friends for their camera roll the next day. Every moment, kept in one place. HOW IT WORKS • Create an event in seconds and set where and when it's happening. • Invite people with a tap — share a link or let them scan your event's QR code. • Everyone snaps. Everyone sees. One gallery, filling up in real time. • Heart your favourite shots so the best moments rise to the top. • Save any photo — or the whole gallery — straight to your camera roll. BUILT FOR REAL EVENTS • Pin your event on a map so guests can find it. • On-site mode: only let people at the venue add photos, so the gallery stays authentic to the night. • Hosts can approve photos before they appear, and keep the gallery tidy. PRIVATE BY DEFAULT • Private events are invite-only. • Report or block anyone, any time. • Your account and everything in it can be deleted from the app whenever you want. Photos, videos, friends, group chat, and a map of your events — Keptt keeps the whole night together.

Screenshots

AstroShader4 screens
Keptt4 screens

Verdict

The call

The clearest difference is price: Keptt at Free against AstroShader's $1.99. Keptt also leads on review sentiment (100% vs 62%) and update cadence (every 9 days vs every 3 weeks). AstroShader's advantage is chart position (#23 vs unranked). On ads, in-app purchases 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

Keptt is free to download; AstroShader costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

AstroShader ships an update every 3 weeks, Keptt every 9 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 5 level
AstroShader versus Keptt: the parameters behind the verdict, then further details
ParameterAstroShaderKeptt
Price$1.99Free — better
Rating4.3 (121 ratings) — better—
Positive reviews62.3% of reviews100.0% of reviews — better
Number of ratings121 — better—
Update frequencyEvery 3 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#23 — better—
DevicesiPhoneiPhone
Requires iOS18.016.4 — better
Further details — not scored
Size9 MB66 MB
Age rating4+12+
DeveloperAstroShader LimitedKEPTT LTD

Customer experience

AstroShader

All ratings105 ratings
Positive80.0%
Neutral8.6%
Negative11.4%
Written reviews114 reviews
Positive62.3%
Neutral14.0%
Negative23.7%

Keptt

Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

AstroShader

No in-app purchases

None

Keptt

No in-app purchases

Questions

Is AstroShader free?
AstroShader costs $1.99, with no in-app purchases.
Is Keptt free?
Keptt is free to download, with no in-app purchases.
Do AstroShader or Keptt have ads?
Neither AstroShader nor Keptt shows ads.
Which is updated more often, AstroShader or Keptt?
AstroShader ships an update every 3 weeks, and Keptt every 9 days. Most recently, AstroShader was updated on October 30, 2026 and Keptt on October 24, 2026.

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