Comparison

Grain+ vs Open Prompter

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

Head to head
About

Grain+

Easily add realistic film grain and noise to your photos with adjustable intensity and multiple grain sizes. This app offers a straightforward, ad-free experience with a single purchase for lifetime access.

Highlights
  • Add film grain and noise
  • Adjustable intensity
  • 3 grain sizes (fine, medium, coarse)
  • Instant sharing
  • No ads or subscriptions
  • One-time purchase
Features
Read full description

We looked for a simple way to add grain to our photos, but with no ads and no subscriptions. It didn't exist, so we built it. Grain+ does one thing, beautifully. Pick any photo. Add film grain. Done. • 3 grain sizes: fine, medium, coarse • Adjustable intensity • Instant sharing • No ads. No subscription. • One purchase. Yours forever.

About

Open Prompter

Record content with a teleprompter that reads markdown files directly from your device. Features voice tracking, customizable text, and front camera recording. Seamlessly saves videos to your Photos and script folders.

Highlights
  • Reads markdown files from iCloud, Obsidian, or Files
  • On-device voice tracking for scroll synchronization
  • Front camera recording with picture-in-picture
  • Adjustable font size, scroll speed, and legibility fonts
  • Horizontal and vertical mirroring for teleprompter rigs
  • Bluetooth remote support for playback control
  • Open source and no account required
Features
Read full description

Open Prompter is a teleprompter supporting markdown files and every "Pro" feature you need to record content (plus some extras). It reads universal .md files from iCloud, your Obsidian vault or any source in IOS Files — as-is, with live updates, no paste, no import needed. Read it back at your pace with voice tracking while the selfie camera records you. The file saves to your Photos and back to your script folder for the most seamless workflow. THE READING EXPERIENCE — Voice tracking using on-device speech recognition follows what you actually said, so the page advances when you do. Your data never leaves the phone. — Horizontal AND vertical mirroring for beam-splitter teleprompter rigs. — Six legibility-tuned fonts built in: Atkinson Hyperlegible (default), Lexend, System Sans, Verdana, New York (Serif), and the brand monospace. — Adjustable scroll speed (5–200 px/s) and font size (16–160 pt) so dense scripts and eye-line reads both work. — Focus mode dims the chrome for clean recording — a single eye button brings it back. — Full-bleed prompter with vertical or horizontal rotation. CAMERA AND RECORDING — Front camera native recording inside the app. A picture-in-picture tile floats over the script while you read; tap it to promote to a full-screen camera preview; tap minimize to collapse it back. — Open Gate recording on iPhone 17 with the full 1:1 front sensor at 3840 × 3840. Perform your script once, crop a 9:16 / 1:1 / 16:9 from the same take in your editor. No reshoot for every platform. — Save next to the script: toggle in Settings → Recording. When on, the .mov writes to the same folder as the .md so iCloud delivers the take to your Mac next to the script. No "where did I put that file" hunt. — Standard or High Bitrate HEVC, sized for quality and efficiency. — True 24p frame rate or 30p or 60p (if you're feeling wild). BUILT-IN EDITOR Tap the pencil in the top bar to open the file. Changes save back through the file coordinator — iCloud syncs them to your Mac the same way it syncs any other file. BLUETOOTH REMOTE Pair any Bluetooth keyboard or media remote and bind buttons to play, pause, mirror, restart, and more. Volume-button capture is opt-in (Settings → Remote) so the volume rocker still works as a volume rocker by default. WHAT IT UNDERSTANDS Open Prompter parses real markdown. Headings render as headings, bullets as bullets, numbered lists as numbered lists. Front matter, Callouts (> footnotes, tables, and visual-direction brackets ([B-roll: ...]) are stripped. Aggressive stripping is on by default; turn it off in Settings if you want to see cues on screen. WHAT YOU WON'T FIND HERE No account. No subscription. No analytics. No tracking. No third-party SDKs. No network calls of any kind. Voice tracking and the camera both run entirely on-device. Open Prompter reads the files you pick from the built-in Files app, captures with the camera you already own. OPEN SOURCE Every line of code is on GitHub under the MIT license. REQUIREMENTS — iPhone on iOS 17 or newer — For iCloud live-sync: the same Apple ID on Mac and phone — For Obsidian vaults: Obsidian Sync or any folder the iOS Files app can reach — For Open Gate recording: iPhone 17 family (older iPhones record at the maximum frame their sensor exposes — the square-headroom re-crop trick is iPhone 17-only) — For Bluetooth remote: any keyboard or media remote your iPhone can pair with

Screenshots

Grain+4 screens
Open Prompter4 screens

Verdict

The call

The clearest difference is price: Open Prompter at Free against Grain+'s $0.99. Open Prompter also leads on rating (5.0 vs 4.8). Grain+'s advantage is update cadence (every 2 days vs fortnightly). On ratings volume, ads, in-app purchases and monetization model 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

Open Prompter is free to download; Grain+ costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Open Prompter holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 4 respectively.

UpkeepUpdate frequency

Grain+ ships an update every 2 days, Open Prompter fortnightly. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
Grain+ versus Open Prompter: the parameters behind the verdict, then further details
ParameterGrain+Open Prompter
Price$0.99Free — better
Rating4.8 (4 ratings)5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings44
Update frequencyEvery 2 days — betterFortnightly
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPad — better
Requires iOS18.217.0 — better
Further details — not scored
Size6 MB7 MB
Age rating4+4+
DeveloperBenedikt HannemannLELAND ANDREW DUTCHER

Customer experience

Grain+

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Open Prompter

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Grain+

No in-app purchases

None

Open Prompter

No in-app purchases

Questions

Is Grain+ free?
Grain+ costs $0.99, with no in-app purchases.
Is Open Prompter free?
Open Prompter is free to download, with no in-app purchases.
Which has better reviews, Grain+ or Open Prompter?
Open Prompter is rated higher. Grain+ averages 4.8 out of 5 from 4 ratings, while Open Prompter averages 5.0 from 4 ratings.
Do Grain+ or Open Prompter have ads?
Neither Grain+ nor Open Prompter shows ads.
Which is updated more often, Grain+ or Open Prompter?
Grain+ ships an update every 2 days, and Open Prompter fortnightly. Most recently, Grain+ was updated on October 13, 2026 and Open Prompter on October 8, 2026.

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